Quote:
Originally Posted by Oldsproject
Not sure if the Jetstar has the same spindles as a "65" Cutlass (perhaps one of the experts will chime in) but if it is try www.paddockparts.com. They claim to have true bolt on kits for a "65" Cutlass. If you find out they are the same and do it, let me know how it turns out as I'd like to do my car (Cutlass) in a few months. |
The J88 used unique B-body spindles with A-body brakes and 4.75" bolt pattern. All other Olds B and C-body cars used a 5" bolt circle. Disks were optional on the 67-70 B-body cars but with the 5" bolt circle. Note that these larger rotors ARE NOT AVAILABLE anywhere.
The A-body spindles are different and will not work on a J88. The caliper brackets may be able to be adapted. The J88 uses the same wheel bearings as the A-body, so Cutlass rotors should bolt right onto your spindles. Use the 69-72 single piston caliper and a same year master cylinder and proportioning valve and it might work.
The one problem with adapting the caliper brackets will be the need to machine the spindles. The drum brake backing plate attaches with three bolts, a large one on top and two smaller through bolts on the bottom. These bottom bolts also attach the steering arms. The caliper brackets attach to the top bolt and one of the two bottom bolts. The boss that the top bolt threads into needs to be machined down to allow the caliper bracket to fit properly. A machine shop can do this if you pull the spindles off. I don't know if the A-body caliper brackets have the same bolt spacing as the J88 spindles, but I suspect they do. If not, it's a simple cut and paste with an arc welder to get them to fit.
By the way, EVERYBODY and their mothers sell repro A-body brakes. The caliper brackets regularly sell on ebay for around $40 a pair. The A-body rotors, wheel bearings, grease seals, and calipers are all available at any auto parts store.