For your goals, you'd need a solid 1000HP. A good fully ported set of -1's can do that. Depends if you want any reserve left to tap. How much more is the 572-13? ...the B1 orig?
I have decided to go to 572-13. Reasons; power goal, as density altitude kept me in the 8.80s a lot. I can transfer my intake, valve covers and locks , retainers and springs and possibly pushrods. If I pick up 75 hp, I will be close to my 8.50 cert, as 104 lbs less weight, and power gain. If I come up short I can use M5 fuel, which is worth over a tenth. Check the race parts for sale section for new listings!
