I wanted to ask that question but didn't want to get flamed by "know-it-alls"
The way i see it is (and have read it several times) that just as long as the two flanges are parallel or in phase that you're good to go.
So, in my little mind, I'm layin under the truck staring at it and think it's rotating in a circle anyway, so what's the difference between being in phase with trans C/L above and below C/L of pinion
flange than from side to side phasing? Like I said, it's all a circle.. (wouldn't it be the same if the truck was turned on it's side?? If the flanges are in phase what does it matter..?)
BUT, would the "Ackerman" effect be taken into account? (thought that was only for front suspension though..)
I'm just trying to do this as inexpensively as I can withought doing an axle swap. (I have a 14bolt from a '78 Chevy 3/4 with a locker. BUT it's a 4.10 and an 8 lug will mess up the rims)
Otherwise, I planned on doing the RWD 400 'rebuild' last year since I have a couple 400's built already. Its' just that they're GM.
I have one from a motor home that's got the rear E-brake and wanted to swap the heavy duty parts to the AMC case.
Then, I'm reading through the classifieds and almost fainted when i see someone selling a AMC V8- GM th400 adapter. WOOHOO!
I should have it by Monday!! The dream is getting closer.
WAIT A MIN..
I have a 200r4 and a cable 700r4 that are rebuilt also!
I might just sleep good tonight.