Ive got a 72 Blazer that wont start till its warm. The guy that had it before me put a 383 in it (or at least told me he did) that ive never been impressed with. Dont think it has the right cam. And a Carter carb with no choke. Even when its warm outside it doesnt want to start till i shoot some either down the carb. Even after i get it started I have to rev it up for a few min before it will drive. But if i drive it for awhile and shut it off it starts right back up. I really like this body style truck and with the weather getting warmer i want to be driving it. The old gas tank had a hole in it and im in the process of replacing that so i dont know if that will help at all or not. Any ideas on what i need to do?