Matching Numbers engine block.

I think I posted about this in my Facebook fan page about few weeks ago, but now i got better image quality and with that statement I truely have a matching numbers El Camino. Althought it's just a 350 cid, 250 hp with 2 bbl and turbo 350, but it's still a numbers matching engine block. Original block!T1022CNN stands for T = Tonowanda engine plant, 10 = October, 22 = 22nd day of the month and CNN = 1970, 350 cid, 250 hp, 2 bbl with TH350I can't remember what website we did use it to decode it, but here are few links to decode your own small block Chevy:Now putting that in perspective it gives me a two choices: Do I want to keep this engine, rebuild and make it more powerfull or put it aside and replace it with LSx-motor as I have planned a long time ago?Now one thing before you cast your vote, I don't have the original heads anymore, those were broken back in 2009 , crack between combustion chambers. Then again engine was 250 HP version so those heads were going to be replaced in some point.What do you think? Keep it or replace it?