Big Chief, Is there a good quench pad with those pistons, a D shaped dish instead of a round? And do you have the edge of the pistons ( the non-dished portion) at a zero deck height? One exception to the aftermarket junk I found was the Ross Racing pistons, those things are so nice I wish I'd bought nine just so I could have one on display.
Niell, if interested. I have 10.5:1 static compression and 8.1:1 dynamic with a 230/236 camshaft that has the intake valve close 43 Deg. ABDC. I would imagine a 251/259 cam on a 9.1:1 static engine would have a dynamic a lot lower than mine. I put in a rather mild camshaft, for the build, as I wanted more low end torque than high RPM horsepower, if I was racing as Bigchief is, I would put in a bigger camshaft and take it up to 7000 RPM for the horsepower and speed.
Cole, Sounds like fun. If you're getting Butler to build your bottom end you should end up with a good stout package. Have you/they determined what you will have for chamber size and what your piston dish/dome will be?