the 308 was for my monaro really good motor but turbo pattern and i want to put a 4 spd back in it. the car was a factory 253 but have been quoted $4500 to rebuild it . i have a 350 in my van but that hasnt been good, it was a crate motor put in by previous owner and sitting on 80 kmh one day it dropped a cylinder and started blowing smoke so i am a bit reluctant to throw more money at it