OK

I feel stupid the LQ4 has 9.4:1 I thought it had 9.1 and things just were not adding up.

Giveing the new numbers this is what I have.

4.00" bore
3.622" stroke
61.15cc chamber
.060 gasket
4.100" gasket bore
-.008 deck height
-6.6cc dish

Giveing me a 10.4:1 CR

But I have plenty of room for milling.

Next question is how much can I mill the heads before I have issues with the intake manifold?

I think I can only mil it .030 if so I think that will bring my CR up to 11.3:1

Can I mill it amy more than that?