What head gasket to run....

[jr_ss]

Alright, I've got a built block coming (it's at the machince shop right now getting the bottom-end put together). The deck has been milled .010 and the head .030. I'll be using 8.5:1 Je piston's along with eagle rods. Now I'm curious as to what thickness I should use.

Firstly, are the thickness' the manufacture's give for headgaskets crush thickness or uncrushed? If it's an uncrushed value, what would be the crush value for say a Cosworth 1.1mm, 1.5mm, 1.8mm? That's the head gasket company I would like to use.

Secondly, I used the gasket thickness' given to get a rough estimate of what the comp ratio would be for each given thickness. The 1.1mm would yield 9.47:1, 1.5mm a 9.14:1 and 1.8mm a 8.93:1.

I think the higher comp ratio would give me better off boost driveability and give me super fast response with the 2871r I want to run, but I'm not sure if the valves are going to be close to contacting the pistons, if so maybe a 1.5 would suffice? If anyone has any insight to this it would be greatly appreciated.

FBI maybe you can chime in, or others than have built higher comp ratio engines. Thanks for your time. Glenn