318 pistons

K,so no magnum pistons in an la?

Found a speed pro piston.STL H814,comes in std .020,040,and .060.Flat top with no valve relief.Hypers and coated skirts too.

Comp height is 1.755

So if deck height on a factory teen is 9.6
minus rod length 6.123
=3.477
minus 1/2 stroke 1.655
=1.822
minus comp height 1.755
= .067
So pistons are down .067 in the hole.
using an .028 head gasket compression comes to around 8.7:1 with 70 cc chambers,if the crank is offset ground .020.So slugs would be .047 down

This is with no block deck machining and just a slight cut to the heads for clean up.So any material I do need to remove other than mentioned will bring more comp.To get 9.1 I need a 65 cc chamber or square the deck up with an .020 cut.

I guess easier to use KB pistons.....