Just so you are aware you can have a 9" built with the pinion centered. Currie did mine for me, and all cuz I just can't stand looking at the driveshaft shooting off to one side. I guess I'm symmetrical like that. That and I wanted 31 spline axles too. Oh and I forgot I needed to change the wheel pattern to 5 X 4.5.
One direction or the other or both needs to be offset for the driveshaft U joints to work properly. A perfectly straight driveshaft thru the centerline of the engine and rear axle pinion will tear up the U joints in short order.
So IF I understand this correctly...the offset left-to-right is kool with
the pinion angle at 2-3 degrees on this 9" picture...and my u-joint sould live thru it...theroretically...
...'cause the one I settin' up for my '56 looks kinda just like it outa a '70 effie...am i on the same page???......
You folks have been ALOT of help so far......THANX...
__________________ "If you think you can do a thing or think you can't do a thing…you're right."
I can't tell from the picture, but if the left and right side of the rear axle are different lengths from the axle flanges to the pinion, that's cool as long as you position the engine with the crankshaft centerline parallel to the frame. Do not offset the engine in the frame to match the pinion offset. (you can offset the engine side to side in the frame if needed for starter or steering box clearance, just don't offset it an equal amount to the pinion offset) If you mount the engine with a downwards tilt to the tranny end when viewed from the side (normally this will be the case when matching the factory orientation of the carb flange on the intake being set level with the ground), then the rear axle rotation (pinion angle) should match that angle.
I will be adding a diagram to this post for clarification shortly, stay tuned!
Passionate about autocross racing!
1956 F100 Panel "GRACIE"
2007 Solstice GXP racer, the "KRAZED KANARY"
Third place finish 2009 SCCA National Championships
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