Jeff Gordon marveled as he watched Brad Keselowski and Kyle Busch run nose-to-tail or side-by-side lap after lap for the lead late in the 2017 spring Cup race at Martinsville Speedway.

“These are the two of the most equal race cars and one of the best races for the lead I’ve seen here at Martinsville in a very long time,” said Gordon, a nine-time Martinsville winner, on the FS1 broadcast.

Keselowski and Busch rarely seemed apart for a spell within the final 100 laps, whether it was Keselowski pressuring Busch or Busch doing the same thing by closing on Keselowski’s rear bumper.

It is the type of racing NASCAR hopes will return with the announcement this week of a short track package, which includes a smaller spoiler, that shares similarities to what was run in 2017-18.

What makes that 2017 spring Martinsville race stand out is how close Keselowski and Busch ran to each other before Keselowski won.

It contrasts the 2019 spring race, which featured a larger spoiler as part of the high downforce package used at all tracks. Keselowski led 446 of 500 laps that day. Runner-up Chase Elliott could not run close to Keselowski for long.

Keselowski explained to NBC Sports the differences in those packages and why the cars could run closer together in the 2017 race than the 2019 race.

“You’re able to brake differently, the cars were harder to stop, they had a smaller spoiler, so you had to really use a lot of finesse to work them down into the corner,” Keselowski said of the package used in 2017-18. “You didn’t lose the nose as quickly because you weren’t using aero as such an assist in the middle of the corner.

“If you had asked me earlier in my career if I thought aero would come into play at Martinsville, I would have said you were crazy. Same thing I would have said if you had told me that the cars would make almost 4,000 pounds of downforce. Those two conversations go hand in hand.

“The 2019 car, the easiest way I know how to explain this … at full speed at the tracks that we ran at, if the race track would have been inverted, the car would have stayed on the racetrack. That’s downforce. … It’s to a point where it could be a Hot Wheels track and we could run upside down. That tells you how much assistance the cars were getting from the air.”

The short track package will be used at all ovals 1 mile or less and the three road course events for a total of 14 races this year. Eight of the season’s final 15 races, including five in the playoffs, will be run with this package. The championship race at Phoenix will use this short track setup.

“Making this change is certainly a step in the direction of putting the racing back in the drivers’ hands and out of aerodynamics’ control,” Keselowski said. “More times than not, but not always, the result is better for the fans. I think it’s a win as a whole.”

2. Tire change with short track package

One of the complaints drivers and teams had last year was the lack of tire wear during events. Without such wear and tire falloff, drivers found it more challenging to pass, particularly at short tracks.

With the lower downforce package at short tracks this year, Goodyear will construct a tire intended to wear more, said Greg Stucker, Goodyear’s director of racing.

“We are going to make some changes,” Stucker told NBC Sports about the tire that will be used with the short track setup.

“From a traction, from a grip-level perspective, I go back to what we learned at the Martinsville test that we had there in July, what we learned at our Richmond test back in October. Granted that was in the Next Gen car, but we were able to evaluate some things and learn some things about Richmond and the same thing with Phoenix because we evaluated several different compounds. We got different reference points at those two tests along with stuff we’ve done in the past at those two race tracks testing-wise. We were able to formulate a plan to go a little softer than what we have been.

“Even understanding that the downforce is coming off, on top of that, we’re going to go ahead and take a step in trying to increase the grip level mechanically, which will also result in higher tread wear that, hopefully, will fall off.”

Goodyear will not do any testing before the first race with the short track package — Phoenix on March 8 — because there isn’t enough time.

NASCAR met with drivers, teams, Goodyear and others in Nashville before the December awards banquet to devise a course of action for the short tracks. That followed NASCAR President Steve Phelps saying before the season finale in Miami that “our promise to our fans … is that we are going to provide the best racing we can at our short tracks.”

One issue that has not been determined is if the traction compound applied in the corners at Phoenix Raceway last year will be reapplied for the March race. With a new short track package and a new tire, the traction compound might not be needed.

“Our opinion, and I think everybody’s is … (the traction compound) is to enhance the multiple racing lines, it is enable multiple grooves to come in at a particular track,” Stucker said. “We’re not in favor of just applying traction compound on a racetrack just to go faster. That’s not the goal.”

3. Decisions, decisions

Among the challenges for some teams with the short track package is determining how much wind tunnel time to devote to that setup and to the higher downforce package used at the bigger tracks.

NASCAR announced in October that organizations would be limited to 150 hours of wind tunnel time in 2020.

While the short track package shares similarities to what was run in 2017 and ’18, it’s not the same. Jimmy Makar, senior vice president of racing operations for Joe Gibbs Racing, said that wind tunnel time will be important for the short track setup.

Makar told NBC Sports that it will be a “challenge” to properly divide the wind tunnel time between the low downforce and high downforce packages.

Even with simulation programs playing a greater role for teams, Makar says wind tunnel testing is still vital.

“You can learn a lot of basic things in (simulation) and kind of get your preliminary ideas and thoughts together and then apply them in the wind tunnel to get your final decision on how that change worked,” Makar said. “The wind tunnel, I think, probably is still your closest thing to the racetrack.”

Other key decisions for teams will come as the year progresses.

Teams will have to decide how to allocate resources in preparing high downforce cars, low downforce cars and also the Next Gen car that debuts in 2021.

“It does create a bit of a different challenge because it is that much different,” Makar said of the Next Gen car. “It’s completely, uniquely new to us. Just looking at the car and how things bolt together, it’s a big learning curve for all the teams. It’s not like over the years when you had a body change or an aero package change, it’s still the same car.”

Makar said one thing that will help is that with NASCAR putting a freeze on teams developing new parts, those crew members can focus on the Next Gen car.

Another key issue will be for any organization that has multiple teams in the playoffs — and even multiple teams in the final eight or the championship race. Go all in on a championship or work on the Next Gen car to begin next year strong?

“In my view, the obvious thing is (this year’s) championship is the first and foremost goal,” Makar said. “That’s what we have to focus on. That’s the next thing in line.”

4. His turn

The recent shuffling of drivers and crew chiefs at Team Penske could have some fans of Brad Keselowski feeling down.

Car owner Roger Penske split Keselowski and crew chief Paul Wolfe, sending Wolfe to work with Joey Logano. Penske also moved Logano’s crew chief, Todd Gordon, over to be with Ryan Blaney. That left Jeremy Bullins, who had been Blaney’s crew chief, to join Keselowski.

So what would Keselowski tell his fans about now being paired with Bullins?

“First thing I’d tell my fans is that Jeremy is the only Cup crew chief at Penske of the three that hasn’t won the championship,” Keselowski said. “The way I see it, he’s the next one to win one.”

Keselowski is focused on this season but he did tell NBC Sports that “I’m super proud of everything we were able to do as a team with Paul as crew chief and everyone else that was on the team at that time. I haven’t really spent much time looking out the rear window because I can’t change anything. So I’m looking out the front windshield.”

With a new crew chief will come new demands.

“I’m sure that Jeremy and the team are going to challenge me to be better,” Keselowski said. “I think that’s healthy. I’m going to do the same with them. I guess I view it as a complete blank slate. Our goal is to be the best and win the championship in 2020.

“What’s great is that we all have enough experience for that to be a realistic opportunity. If you combine that with our willingness to try new things, I think it could be a lethal combination.”

5. A name to remember

Cannon McIntosh’s assignment last fall was to write an essay about himself as if the high school junior was preparing a college application.

He felt good about what he wrote.

Until he got his grade.

A zero.

McIntosh’s instructor thought what McIntosh wrote was not true, that it had been plagiarized. No way, the teacher assumed, this student was a race car driver.

The situation was quickly rectified. Soon more than McIntosh’s teachers will know who he is.

The 17-year-old has been making a name in midget racing the past year and earned a ride with Keith Kunz Motorsports for this week’s Chili Bowl as a Toyota Racing Development driver. Keith Kunz Motorsports has won the past five Chili Bowl titles, including the past three with Christopher Bell.

McIntosh, who grew up in the Tulsa, Oklahoma suburbs and has to only make a short drive to the site of the Chili Bowl, won his preliminary feature Monday night to earn his first berth in the Chili Bowl Nationals A main.

He can’t wait until Saturday night’s feature race.

“I’ve raced pretty much all the guys that are going to be in that feature,” McIntosh told NBC Sports. “I know what to expect, and I know what I’m going to have to bring to the table, racing against those guys.

“(Kyle) Larson and Bell are definitely going to be the ones to beat coming Saturday. I’ve raced them before and I know what to expect. I’m going to have to be on my game. No matter what happens, we did well, we made the feature. I’m just hoping we can put on a good show, let them know we were there to fight.”