Make sure you can get the stack of parts you want before the shop cuts the block deck height. Get the stack first, then cut the block decks to the stack.If you cut the block decks without having the stack of parts in hand, then you may not be able to find the right parts to fit the block. AGAIN, BUY THE STACK OF PARTS THAT YOU WANT TO USE FIRST, THEN CUT THE DECKS TO FIT THE PARTS.
As far as the static compression ratio, if it were mine and I wanted to run 87 octane pump gas with a carburetor and no electronic controls on the motor, I'd be pulling the SCR back to 8.5:1. Proper choice of parts with EFI and all electronic controls on the motor would allow you to run more SCR, but I would be afraid of building a motor that would detonate on 87 if I used a carburetor.
With 8.5:1, I'd use a cam something like this Crane hydraulic roller. You can use anyone's cam that you want to, but I would use something pretty close to these specs if I were building the motor for you.
https://www.summitracing.com/parts/crn-119811
And furthermore, truth be known, if I had a 9" stack of parts, I would probably cut the block decks to 8.994", allowing the piston to push out the bore by 0.006" so that I could run a Fel-Pro 1003 head gasket (0.041" compressed) and set the squish/quench at 0.035".
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