Widest tire, stock body, aftermarket rear axle

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Grendel

Not-quite-so-new-guy
Feb 4, 2017
17
2
3
What's the widest tire/rim I can fit with a stock body and frame, but narrowing the axle?
 

Grendel

Not-quite-so-new-guy
Feb 4, 2017
17
2
3
I guess I don't need to narrow the axle, but I am installing a 9" to handle the HP of a turbo LS.
 

565bbchevy

Geezer
Aug 8, 2011
9,590
12,612
113
Michigan
If you are going for traction then plan on notching the rear frame rails until they are flush with the inner rear wheel well.
 

Grendel

Not-quite-so-new-guy
Feb 4, 2017
17
2
3
I don't want to cut the frame. Yes, I can, but would rather not. I know a 315 will fit with notched frame rails.
 

Clutch

Geezer
Apr 7, 2017
5,183
10,900
113
Brick NJ
I don't want to cut the frame. Yes, I can, but would rather not. I know a 315 will fit with notched frame rails.
I had 29.5x9-15 e/t drags on my 87 Cutlass with the 7.5 and stock 442 rims ran a.5 spacer and they just hit the front of the inner wheelhouse
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motorheadmike

Geezer
Nov 18, 2009
8,976
27,522
113
Saskatchewan, Truckistan
315/35R17. Stock 8.5" diff, trimmed wheel lips, and 17x11 wheels.

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79 USA 1

Royal Smart Person
Sep 2, 2011
1,061
2,031
113
Cheektowaga, New York
1979 Monte Carlo
15 x 8.5 Center line Convo Pro, 3.50 backspace, 28 x 11.50-15 Mickey Thompson ET Street, 7.5 stock width axle.
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