Quote:

Guess they're not bigger than 245 stock....

the RP245 I just measured with 2.15 Ferrea Comp Plus valve 245.5 CC...

The std port height "245" head must be smaller than 245.

I've only had 2 sets of those here & never measured them volume wise.

So which ones should I go with. The motor is a 408 now but I may go larger down the road. Im looking for max power. I run this car in a stock suspension 28 x10.5 tire class and run 2 kits (400 hp total) Can they be ordered with the bigger valves? Im running a 4.035 bore now, just wondering if bigger valves will fit. The pistons are custom Ross domes. Im ordering just the assembled heads, I already have T&D rockers on the heads I have now and my friend thats buying my heads already has the Indy rockers to go on them. Im looking for max power. My motor makes peak power now at 7600 rpm's. Made 530 rwhp through a Dana 60 and ran 6.30's @ 107 through a glide in a 3200 lb car with driver. My mustang that the motor is in now runs 6.40's @ 109 in the heat of Summer with only a 3.73 gear and a tight converter. Its 2940 with driver.
369's Modified set are 254 CC.