previous questions not answered - 1. how thick / part number head gaskets 2. what rear gear / tire size planned 3. closed chamber size ? stock is ~ 78 cc. Removing a valve cover to check lash is not much to do where I am. I was trying to help, I am road warrior as well as a mechanical engineer, I take notes and my 360 a body runs 11.6 @ 117 and street driven for 25 years, 11.5 : 1 , 306*/306* .555" / .555" solid cam, 93 octane, 4.56 gears, iron heads with quench ported by me, combination and engine and trans and rear assembled by me