I have a 67 F-body witha 12 bolt rear. I'm in the process of mini-tubbing(3 inch) the car and relocating the shocks & springs inward to accomodate 335/30/18 inch tires. I'm not at the point where I can personally measure yet but just wanted to get an idea of how much I will need to narrow the rear end on each side to minimize the backspacing as much as possible so that I can have as deep of a dish on the 18x12 rear rim as possible.

Off the top of my head here, if your moving the everything in 3 inches with a 3 inch minitub kit(DSE kit) would you basically want to narrow the rear 3 inched on each side for a total of 6 inches or can it be narrowed even more to accomodate a real nice deep dish wheel??

Measuring will obviously yield the ultimate answer but I just want to run this by you guys first. graemlins/thumbsup.gif

Thanks, chris

There are limits as to how far wheel manufacturers will make the backspacing/offset on a wheel that big. I'd make sure you know exactly what your wheel options are before you touch the rear end.

Also realize that three inches per side may get the leafs into a weird place; with a minitub they do move inward but not that much. If you cut 3" off the housing however.........

The Mule had 18X12.5" wheels with 335/30's in the rear with a 6.75" b.s. wheel. This gave the wheel a much deeper dish which looked great. He did narrow the rear to somewhere in the 55" total width area, but that's nowhere near 3" per side.

Jody

Well, actually from what I've measured from my 10 bolt cutting three inches off each side would net a 54" wide rear.....

I would do as suggested above though. Look at what range of backspacing is available on the wheels you want before you commit to anything. From memory, the minimum bs for most 12 in wide wheels was 4" or so. The ultimate way to acheive what you want is to buy the wheels you want and put them under the car where you want them then measure the distance between the mounting flanges.