Quote:
Quote:
Quote:
Holy Crap,I spent my hard earned $$$ buying not just 1 set but 2 sets of 572-13 heads,when I could have save $$$ by using 440-1 heads  I just let 1 set go with my spare engine,but you can bet the farm on this I won't be replacing them with a set of 440-1 heads. 
I would run another set of -13's anyday, It's not all about flow numbers.
You got that right. So lets start the list of 1000+ hp -13 motors out there I do know of one but it is a BIG motor...
It is your money spend it however you like but IMO there are better valuaes out there than the 572-13 head for the money. As for the OP seems the consensus is to save money and port what you have. If you want to upgrade I think most will agree DONT go to the -13. But we are all likely wrong 
the predator head guys could say the same thing about b-1,s. " dont waste your money on b-1,s, when you know predator,s out perform them" 
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
| 
