I am finally going to get things moving on my 1970 Monte Carlo. I have the option of getting a turn key 383 crate engine, or rebuilding my 400. My budget for the whole project is around $7000-$8000 for everything. Car: 1970 Monte Carlo Engine: 400sbc 2 Bolt main. I have Stock: Block, crank...

since I always have heard ppl say 400 heads are garbage, I was wondering would the heads off my 68 307 be better? I would of course have them upgraded ported,springs, valves. would they be better than the 400 head I have now which has also been ported springs valve job. the motor hasn't been...