360 compression issues. pick a piston??
The flat top with valve reliefs then
If they are the HC116CP flat tops, you won't get a good quench gap.
Rod length 6.123
1/2 stroke 1.79
Comp height 1.660
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Piston height 9.573 from crank centerline
Stock deck height from crank centerline 9.599
Piston deck height = -0.026" (in the hole)
Felpro 1008 gaskets 0.039" compressed height
Quench gap = .026+.039 = 0.065 " ====> too big for effective quench. Maybe it'll be .060" with a simple decking job, but still too wide. Static CR will be 11.2
Did you read my post on the KB232's? Dish with raised quench pad; in this case, it would work out to a .045 quench height with an 18 cc dished top and the static CR will be 9.7.
Just as a side note..... all the above goes out the window if something is true.... which you need to doublecheck. You are using 65 cc Edelbrock clones? The Edlebrock 65 cc's are not closed chamber. They are like the open chamber SBM heads, with an open area at the top of the combustion chamber. See here for how the Edelbrocks look; scroll to the pix of the bottom and look at the circular area milled on the underside; that is about .060" deep and changes all the quench and CR calculations. Now your Speed Pro flat tops have a quench gap of over .110", or no quench at all. Static CR will be below 9.
http://www.amazon.com/dp/B00063012I/?tag=fabo03-20
I see the pix of the Speedmaster and they do look closed, but I'd make sure.
The spring pressures are on the high side too if you are running .500 lift or less.