I'm in the porocess of building a 383/438 stroker.

On the KB calculator my computations come out as follows

Heads = 84cc
Piston Head volume = 4(valve reliefs on flat top pistons)
Gasket Thickness = .029
Gasket Bore -= 4.350
Cylinder Bore = 4.310
Deck clearance = .010
Stroke = 3.750

Computes to STATIC compression of 10.203

adding rod length = 6.760
Valve timing @ 6* Intake closing point = 38*

Dynamic CR = 9.472

I am trying to keep the quench at .040 so if I were to use a head gasket of .039 I would have the block decked for 0 deck clearance.

Will this run on the 91 octain I have available to me. If not what do I need to do to keep the quench but lower compression (if I have too)?

Thanks
Frank

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