15" wheels and 28x9 bias slicks

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DavidLee

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On a 67 cuda, what would be the best bs and width on a stock width 8 3/4 rear, springs on stock position. Running a +1 caltrac spring and their traction system. This is a track only car
 
This car had 15 x 7 Auto Drags with the 3 5/16 backspace and 28 x 9 MT slicks. They hugged the lip of the quarter a little too close and didn't let me drop it down much. I had a choice of the 3 5/16 bs and 4 7/8...in hindsight I should have done the 4 7/8 and clearanced the inner wheel tub or even run a small spacer.

So I would say ideally you want a 4 1/4 to 4 1/2 backspace and a 15 x 7 or 15 x 8 wheel. 15 x 8 with 4 1/2 bs would probably be perfect.

2s4q.jpg
 
This car had 15 x 7 Auto Drags with the 3 5/16 backspace and 28 x 9 MT slicks. They hugged the lip of the quarter a little too close and didn't let me drop it down much. I had a choice of the 3 5/16 bs and 4 7/8...in hindsight I should have done the 4 7/8 and clearanced the inner wheel tub or even run a small spacer.

So I would say ideally you want a 4 1/4 to 4 1/2 backspace and a 15 x 7 or 15 x 8 wheel. 15 x 8 with 4 1/2 bs would probably be perfect.

View attachment 1715148273

Thanks much
 
This car had 15 x 7 Auto Drags with the 3 5/16 backspace and 28 x 9 MT slicks. They hugged the lip of the quarter a little too close and didn't let me drop it down much. I had a choice of the 3 5/16 bs and 4 7/8...in hindsight I should have done the 4 7/8 and clearanced the inner wheel tub or even run a small spacer.

So I would say ideally you want a 4 1/4 to 4 1/2 backspace and a 15 x 7 or 15 x 8 wheel. 15 x 8 with 4 1/2 bs would probably be perfect.

View attachment 1715148273
-------LIKE THAT CAR !!
 
It's dead unfortunately. Sold it in '95 to a guy who put the engine in his Challenger, and the rest got parted out. Last I heard the empty shell is somewhere in the sandhills of NE.
Must have been some hidden rust ! ?????
 
No it was typical rust, very repairable. The guy that bought it was notorious for destroying cars...I really shouldn't have sold it to him. But hindsight is 20/20 and all that.
that's BAD. MUSTA BEEN A CHEVY GUY !!
 
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