Valve clearance question

Running a FRRP 514 short block with it's dish style pistons, and topping it with Blue Thunder open chamber 100cc raised port Ford exhaust heads, valves are 2.25 intakes & 1.88 exhausts. Cam is a Crower hyd, specs are intake 574/290 exhaust 567/296 LC is 108. I was planning on clay testing the clearance, but thought I would see if anyone on the forum had run anything similar . This is my old top end from my 473, just switching it over to the 514. Had no clearance issues with TRW/Speed Pro L2404F . Head gaskets were ICS Titan copper 043 thick. Any input is always appreciated.

You better clay !!! You will have RADIAL clearance issues.

Uncle Charlie

Thanks Charlie, I kind of figured with the large valves & where Blue Thunder set them there could be issues. That's one of the reasons that I haven't ordered my head gaskets yet either, I'm going to test with the old copper, and see if thicker is needed as well.

IF it is a legitimate FRPP 514, running those heads will get you about 8.5/1 compression ratio if that is what you are looking to get, or not.

rmcomprandy wrote:IF it is a legitimate FRPP 514, running those heads will get you about 8.5/1 compression ratio if that is what you are looking to get, or not.

8-71 on gas.