I hear you on the tech hotlines.
That said, even with the .140 head gasket, I'm still at 12:1. Doesn't look like I can mill enough off the dome to get where I need to be. For the price of new pistons, I don't think it's worth messing with.

Baker says that brodix recommends a 4.540 bore to optimise the combustion chamber. The guy rembered quite a bit about the supercat program. He remembered the stroke being slightly less than 4".

Thanks for the replies. I appreciate all the ideas.

look into race tek pistons.they will make whatever you want.they are not cheep but you get what you pay for.

Thanks mike. I appreciate the help.

Update on this madness:

I ended up Calling carillo/cp and talked to a super guy in the piston division. He was able to pull up the original supercat job and had all the particulars available. He said they did the job for Pfaff racing. Must have been sterling for the east coast and Pfaff for the west coast. Anyhow, he had a "shelf" piston in their sportsman "bullet" line in 4.560 and with a compression height of 1.275. Great value as they come with the file fit rings and available with a .200 wall pin. With a 9.780 deck, a 124cc combustion chamber, a .050 gasket, the 3.920 stroke crank and the 6.535 long rod we came out at 9.9:1 compression. We can make the final adjustments after any decking the block and milling the heads with a thinner or thicker head gasket.

I'll say that mike at CP was extremely helpful and knowledgeable and treated a one and done guy like me as a valued customer.

Also, my buddy that will be assembling this creation emailed the cam information sheet to bob and we got a 55mm cam spec'd out. He has the quote but it was something in the neighborhood of 246/254 and 700ish lift on a 111LSA.

The block is at victory engines for a .060 overbore and he will be resizing the Carillo rods and balancing the whole deal when the new pistons arrive.

Just thought I'd update this thread in the off chance anyone is interested and following.

Love good threads like this , please keep the info coming!
Subscribed.

Sounds like a great build. Like picking up an sb2 from North Carolina and tweaking it to street drive in a camaro

The cam you spec'd sounds pretty mean, what was the ballpark lift/duration on the race engine? 13:1just sounds cool saying it....

imo,this will be a good running build that will have no problem running 93 oct fuel.i do believe going with a piston change was the only way to do it right.the cyl heads are not the best but i would have used them as you did.i think you will be pleasantly suprised with the dyno results and i hope you will keep us posted.

Cool thread!

Pull just a little timing out of it and 93 should be no problem.

Chris