I agree with what the others say.. The 216 is an antiquated engine that has a splash oil system that doesn't work as well as the 235 or 250 engines. The 235 engine can still be found in junk yards as there were thousands of them built. My freind had a 51 chevy convertible that you could drive nicely at 55-60mph, but he found out the hard way when he tried to hot rod it. He eventually changed to the 235 from a 56 chevy and still has it to this day although it's been built up wit a milder cam , dual exhaust, better heads and a 4 barrel cam.