Hi, i just got 40 thou removed from my 307 block deck to up the compression to 8.9 to 1..( 76 cc heads ,40 thou overbore ) and have an issue... My intake manifold has a slight gap at its uppermost mating surface with the heads intake port surface. It is 0.5 mm approx when it is just resting on the oil valley rails / heads.. Will the intake gaskets ( felpro ) take up this amount of gap ?
I was told if i got my heads angle milled that i may need to mill the manifold to fit, so i just had the block milled.. The gap is with the heads bolted on, but not torqed down and the manifold just sitting on top of the rails...will the bolt down take up some of this gap ?

Or am igonna suck gaskets in to the head ports ?

Thanks for all help :)

The pistons were about 40 thou under deck height, so now sit at zero deck height, perhaps slightly proud .0005 ..i am using felpro gaskets .0056 thou i think, so will i have a good squish area ? I read abut squish in another forum.....it says squish

Hi again, i have previously measured my chambers with water and got 76 cc exactly, after having them milled ??? I will do it again to be sure anyways :) i am eading that people are running pistons above deck level to get good squish area....mibne are