Hello All,
I have a .030 427 990 Rec heads, ZL1 intake 198 .500 TRW dome pistons set .010 in the hole and Run a custom ground Hyd Flat tappet cam. Ran 12.50's @ 110 on 255.65 15 BF goodrich radial street tires! I would go with a Hyd flat tappet. 427 will run strong either way! I use Sunoco ultra 94 and have no problems! It's a true 11.2 comp also! Good luck!
