I'm at a cross roads right now and not sure which way to handle this. Maybe I am all wrong,.. hopefully someone can set me straight.

I have a nice C9OE 69 windsor block. (Thanks Raymond). My plan is to set it up to be boost friendly. I want to do a carb'd TT build. The 69 blocks are a 9.48 deck block and will be nearly zero deck with pistons. I'm dropping the whole nitrous idea and will be selling my cheater kit. I fell this block will live a lot longer at 800 hp using turbos then with nitrous. Plus,.. its there anytime I want it.

My problem is getting the compression low enough to be boost friendly.

A 427w will use a 4.171 stroke. My block will have a 4.060 bore. I'm going to be using AFR 225 heads. The largest combustion chamber they have is either 68cc or 72cc with mainly 68cc on the market right now. The biggest dish I can find is -22cc dish piston.

Doing the math,.. I dont see how to get less then 10:1 CR using a very thick head gasket,.. which I dont think would be a good idea for boost. I dont understand how to use over lap on the cam to lower compression. I'm going to build this motor myself,.. this is just something I must do. But I'm trying to gather as much information as I can and this one problem has me stumped.

A 408 uses a 4.0 stroke,.. still not enough to get the compression down to where I want.

The only option I see would be to build a 393 using a 3.85 stroke. That would get the CR down to 8.6:1. I am aiming for 8.4 - 8.5:1 CR. That is what I want,.. I dont want to run boost on 9:1 CR or higher. I want to run as much boost as I can on 93 Octane.

Can anyone give me some insight on how to build a 427w using 68cc AFR 225 heads and build the motor to get 8.4 - 8.5 CR? Should I give up on the 427 and just go with a 393?

Thanks,
Hurst