Tubbed GN's or G-body's?

[83Regal455]

I know i don't have a turbo buick but i hope you will help because i do have a buick g-body with a buick motor

i have a 83 regal with a 455. i would like to put 32x14x15 slicks under the car the wheels are 15x14 with a 7 on 7 offset. even on both sides of the mounting plate.

What do i need to do to tub or mini tub my car?

I have a 86GN 8.5 rear. Would i be better off going to a 9in over cutting the rear?

What suspension do i use?

If anyone has any sites that might help me with this or any info that would be great.

Thanks
Dustin

 

[Turbo6inKY]

You can notch the framerails. If that doesn't give you enough space, you'll have to cut the frame ahead of the axle and weld in a new narrowed back-half.

 

[broke1]

Were mini tubbing and frame notching my GN.Not going to narrow the rear,just want to fit 15x10's and tuck them into the fenderwell.I still want to be able to run my 16x8 GNX wheels when not racing.

 

[KendallF]

You won't be able to fit a tire that big without a full back half/tub job. I have an extreme frame notch/mini-tub done on my car, and the biggest tire that will fit (barely!) is a 29.5x10.5W.

If I were you, I'd buy a 4 link or ladder bar kit and Ford 9" housing from someone like Art Morrison, Alston or Chassis Engineering. They offer kits engineered for the G-body.

http://www.artmorrison.com/
http://www.chassisengineering.com/rearsuspension.html
http://www.cachassisworks.com/

 

[Big Stu]

One of my gn's has neither the frame notched or a mini tub, and I have 29-15-10 firesstone's on it with 15-10 centerlines/4 inch backspace. If you are going to backhalf your car, go with chassisworks kit, real nice. My other car is an 87 backhalf gn, with the alston 9" and 33-18.5-15 et streets. It has the alston 10pt moly cage, with the body welded to the frame.