rear end advise if you please

[BrockGrimes]

Does the1980-1983 Ford F-100 9-inch rear end assembly with the 5-on-4.5 bolt pattern bolt right in to a 69 or will the spring and shock mounts need moving?

Is there a bolt in option to switch up the bolt pattern?

I'm considering a mustang 2 or CV front end also.

[BrockGrimes]

No ideas?

[sargentrs]

I would assume you'd have to move the spring/axle perches. You have to on the dents so the next generation probably has to also.

[tnlprt]

The 80-83 rearend is also 4 inches wider

[HIO Silver]

Does the1980-1983 Ford F-100 9-inch rear end assembly with the 5-on-4.5 bolt pattern bolt right in to a 69 or will the spring and shock mounts need moving?

Is there a bolt in option to switch up the bolt pattern?

I'm considering a mustang 2 or CV front end also.

Sure.. I'll chime in.

The spring pads definitely need to be moved - not sure about shock mounts. In the end, it's not a direct bolt-in.

If you're doing the CV swap, then the front and rear would match. If keeping the 5.5 pattern, the better option is to get a 9-inch out of another Bump....no mods necessary.

[BrockGrimes]

A tech at Currie says the axles are the same but I knew they were wider, so it figures another person who doesn't know their job.

[BrockGrimes]

Figure maybe a CV front then get the rear drums drilled for the new pattern. Also will get the drums drilled for venting and better traction. Its an old racer trick.

[ultraranger]

Or, you could get the '80-'83 9 - inch rear end with the 5-on-4.5" lug pattern, lose the drum assemblies, add some Cobra large axle bearing adapter brackets and bolt on a set of Cobra rear calipers and the Cobra 11-5/8" rear discs.

http://www.mustangsteve.com/cobrabrakes.html

https://www.streetortrack.com/Cobra-rea ... 24456.html