fastrack and rush engine rules .
Ok I'm new to crate racing. Looking to buy a 604. My question is if you buy a fresh rebuilt motor how many more times can it be rebuilt ?disregard the physical aspects of if it can. I just wanna know if your only allowed 1 rebuild or whatever. Also if you buy a " new" blueprinted motor is that considered a rebuild ?????? And is it worth the extra money to get a blueprinted motor or just get a sealed one from gm. Any insight will be greatly appreciated!!! Thank you.