Yea,a big block or a small block chev will go in,with a chev trans and mounts and such,its basically a camaro. For me,I would hunt for a early-mid 70s 4 bolt main pont 455,they're getting a little hard to find,look for wagons or big boats,they have both early and late mounts cast in and with a decent set of heads,cam,and headers and they are brutal. I threw one together with forged flat tops,70 stage 3 400 heads,a 280-.480 cam,headers,hei,and a stock intake for a friend in his 70 4spd formula and it jerked the front wheels of the ground with ease,and it looked stock,except the headers,and it ran smooth! ,well,a little lope,but not bad. We had some fun with it,ate up some guys,had em chase us down after watching there eyes bug out,then told em we we-rent sure what it was,said we got the motor from the wrecking yard for $325 and painted it! Thats always good for some parking lot conversation once ya leave,hee hee.