Tires and wheel question.

I just came back from taking some measurements in the shed, & hope this can be of some help.

I used this on the rear of my '64 Barracuda (should be the same as your '66) with both the stock 7 1/4 rear & an 8 3/4 rear from a Demon. I had Rocket brand chrome 5 spokes (similar to a Cragar S/S) 14" x 7" with what was called a "standard" offset. After measuring the one wheel & tire I still have the best I could say is that it is a 4" backspacing. I used a Parnelli Jones F60/14 tire with a tread width of approx. 8 5/8", a section width of approx. 9 7/16" & a diameter of approx. 24 3/4 ". This cleared the leaf springs on the inside by about 1/4" when parked & showed very minimal rubbing on the spring when driving. The only way I knew it rubbed was because there was a shiny spot on the side of the springs. The tire was never damaged & I never heard it rub. There were no clearance problems with the outside lip of the fender or inside the wheel tub.

On the front of the car I used the same wheels with an E70/14" & later an E60/14" tire. I had to use a 7/16" spacer to keep the lip of the wheel from hitting the edge of the upper control arms. This was with the factory 9" drums, but I think it would be the same with 10" drums. I don't know about disc brakes. The E70 tires rubbed occasionally when making a right turn into an inclined driveway. The tire would catch the bottom front edge of the fender & then make a thump noise as it "popped" past the fender. With the E/60 tires I never had a clearance problem. Both sizes rubbed the fenderwell headers I had, but I'm assuming you don't have those. It was never a problem, it just rubbed paint off of them. Sorry I don't have any measurements for the E60 tires, but they were stolen long ago. I should also add that I had "cranked up" the torsion bars but don't remember how much it raised the car. It wasn't a lot. I know that I later replaced them (factory '64 V8 bars) with those from the same Demon the rear axle came from & this made the car stiffer in front but it didn't sit any higher.

Hope this helps some. I currently have 10" drums from a '69 Formula S Barracuda on the car & could probably make more measurements for you if you needed them, but the car doesn't have an engine in it right now so don't know how useful they would be. I doubt that I have the wheel spacers any more but I could do some digging. Let me know if you need any more info, I'll do what I can.




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