Question: What is the correct rotation of the 203 if re-drilling to bolt pattern of an NV4500? Should I just make sure the PTO cover is vertical? This is assuming I want to use a standard rotation Doubler. Background: I've got a 1975 Dodge 203 that I'm putting behind a 1995 Dodge NV4500. It's a perfect fit -- almost. /forums/images/icons/tongue.gif I need to change the bolts that hold the input bearing retainer/cover because they don't clear the inside of the factory 4500/241 adapter. I also need to change to the round 6-hole bolt pattern. That's where my problem comes, I don't know what rotation to drill the holes.