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I was wondering if there is a side cant to the intake or exhaust valves on the RY45 heads.

Thank you for the info Brian. One last question... Are both the intake and exhaust valves canted on the RY45?

Wait a minute... Don't the RY45 and the FR9 both have a 4.5" bore spacing? Does either the RY45 or FR9 heads have canted valves?

Will the cylinder heads interchange between the RY45 and FR9 ?

Can someone tell me how the RY45 and the "Ford" engine they run in NASCAR today differ? What components are different? What components are the same? Can NASCAR use aluminum blocks and dry sumps...