09-29-2019, 01:54 PM
(This post was last modified: 09-29-2019, 01:58 PM by Chris Marchand.)
I have a restored 63 and it is riveted at 1 1/2 " on center. An unrestored 64 GP is also 1 1/2" on center. Rupp built lots of these things and prolly was more concerned with get em out the door than design LOL. Virg Love has about as many Rupps as were built. Maybe he will chime in.