I have put about 30 passes on them I bought them from a guy they were in a 70 duster 340 and he put the car back stock they looked real good when I put them in couple months ago my rearend housing is tweaked and I'm going to build a Dana thats why I'm selling all my 8.75 stuff.
I have set of stock length 8.75 axles from a 70 Duster 4" bolt pattern with green bearings and 3" 1/2-20 screw in studs in excellent condition $75.00 plus the ride. Bluford Il. 62864
Part #6077 65cc La Performer RPM Heads were bolted on for mockup purposes but never run heads are as new condition.$1100.00 plus shipping from Bluford Il. 62814.Heads weigh 30lb ea.SOLD
SOLD
I'm leaning toward a 9" like you mentioned the availability of parts and the ease of gear changes not to mention my 2 racing buddies I run with are ford guys and they have a narrowing jig for the 9in and an abundance of parts.