rear end width
I used a Mopar 8 3/4 rear end out of a 66-72 A body car. It measures 55.6" outside hub to hub. Drum brakes on it are 10"x2.5" and the wheel bolt pattern is 4.5", same as the tempest front hub bolt pattern. It did not need narrowing and will allow for a larger rear tire and 7"-8" rim.
The 1963 tempest OE wheel base is 112". I set mine at 113" for more tire clearance and it centered the wheel in the wheel well. Used a ladder bar and coil over suspension. All of the crossmember, pan hard bar, and shock mounting brackets are bolt in. Some pictures are in this thread.
c5farmer
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