looking for a little input on a cheap build im doing for my beater racecars. basically we throw a rollcage in a big old gm and race arounds a 3/8 mile oval and smash into eachother and the winner is the last car running. its great fun and we do get going pretty fast and i like to have the power to push people or be able to out run them. the motor im going to use will be built out of stuff i already have that will be no big deal if i blow it up. starting with a stock 350 with dished pistons and smog small vavle 991 heads. plan on going over it with a gasket set and throw on some 416 casting 305 heads and a performer intake along with my cirlce track prepped 500cfm rochester 2g carb. the cars i typically run are big 70 and 80s gms but sometimes smaller g-bodys or a-bodys and i dont always do gear swaps so could be 2.73s or worse on occasion. basically i need low end torque and i know the heads im running should run out of steam by 4500rpm, so i was thinking something like a comp 4x4 cam would be a nice choice to make great torque from 2-3000 area and pull hard up to about 4500. im looking for something "on the cheap" so if you know of a cam that will get me what im looking for im open to any suggestions or ideas. let me know what you guys think, thanks.