Transmission - Pinion alignment with Mild PB DM

[jerimy75]

Just wanted to check with everyone here on my process and results of setting the horizontal alignment of my transmission and pinion/axle. Here are the specifics:

Mild PM DM front and rear
SBC and 700R4
Chevy 12 Bolt rear end

I am putting new perches on the axle so I can correctly adjust the vertical pinion angle. I centered the axle in the frame the best as I could by dropping a vertical line down from the outside of the frame rail (PB notch). To double check I pulled diagonal measurements from rivets on either side of the frame to the center of the pinion and the dimensions didn't match. I did some additional measurements and realized that the pinion is offset to the passenger side 1-inch. I did some research on here and learned the offset is standard.

Here are my questions:

1. is there a better way to center the axle housing in the frame?
2. should I still center the transmission between the frame rails?
3. is this horizontal offset going to require any special attention when I set my pinion and transmission angles? In general I plan on using the PB suggested angles of transmission down at 6 degrees and first driveline at 5 degrees with the pinion at 5 degrees.


Thanks in advance for your input folks!