[Jagdpanzer]

Paul,
I did the rough out porting work you see in the photo. On this build I will be going with 4.125" bore pistons and the 4.000" Bryant crank I used last time with the 402 CID motor. Also going with 6.000" rods this time for improved piston stability and reduced piston bore dropout at BDC. This doesn't leave much compression height for rings and dishing the piston tops for achieving the 12:1 compression ratio I'm shooting for. Stock combustion chambers measure around 39-40 CC. The chamber in the photo currently measures at 44 CC. 20 CC is probably max the piston tops can be safely dished to. Therefore I will probably have to take at least a couple more CC out of the combustion chambers to reach 12:1.