[cobrashoch]

Slick/ Ernie - And just how do you think the factory did it anyhow? They drilled them too.
Actually, looking at it now though the rose colored glasses of hind-sight, a TO block has some advantages over a SO for roller cams. The reason for a SO in the first place was to help with the spinning rod and main bearings problem. We've came a long way since those days baby. SO blocks also had different cam/lifter towers than top oilers too. Looking over the new Genisis block they worked on that area big time too, as well as the bottom end.
cobrashock