Traded a wagon I was going to scrap for this 350, a 68 396 block, a Saginaw 4 speed, a new Hayes clutch and a Hurst Competition Shifter. He says the motor is fairly fresh. Has roller rockers and he said it has some Crane heads on it. Haven't had a chance to look it over real close yet though. The double humps look good enough to me but want to check out the casting number this weekend. Is there some way to tell the crane heads from regular chevy heads?