im gonna come out and tell ya that a nasty street car is fun for awhile. after i drive my car for an hour or so im ready to get outta the damn thing. its loud, vibrates like a **** and is actually exhausting to drive. is it a freaking blast to take out and beat on? hell ya. would i drive it cross country? no way in hell. if your not gonna take it to the track then why build a race engine? i say do a stock bottom end rebuild with a set of the kb107 pistons. throw in a MILD solid mech. lifter cam and your worked j-heads. that with a decent set of headers and say a performer rpm intake and 750 carb should get you well over 350 hp. that will get you a mid 12 sec car with a decent chassis. a real 12 sec. car is a fast car. most people have never been in a proper fast car. my boss has a 2012 vette. drives it every day. took him out in my dart making 400ish hp and the guy couldn't put a sentence together when he got out.