A couple of thoughts of small block versus big block. Firstly, any engine with a roots blower is pickier then a naturally aspirated engine. I have a 392 with a BDS blower. There is no choke, BDS says won;t work with a blower, the 4 bbl (1100 CFM) is 4 corner idle and mechanical secondaries. Not really secondaries anymore, need the fuel to distrubute evenly across the blower. This makes it disasterous on MPG. Not really easy to use for a daily driver year round. The big block on the other hand is a torque monster, but it will not live long at the RPM's a small block can handle. If you want lots of RPM's go small, otherwise I agree with others that there is no substitute for cubic inches.

Biggest thing I have noticed about most street cars though is that a lot of the money spent on engine is wasted. Lots of torque and horsepower is useless unless the car can launch. Might be an idea to build a warmed over big block (good heads, performer intake and cam, single 4 bbl) and spend some time and effort on the suspension to really stick to the ground. A good strong rear end will be extremely important. The camero is not light and the power you will have could tear up a weak rear. 9 inch is a good choice, it is available to fit EVERYTHING and parts selection is ourstanding. Also, tie the subframes together and if you can cage it to stiffen the car.

Just some thoughts.