Does anyone know the offset to run 9" rims upfront and 12" rims in the rear of a 3/4ton 4x4 suburban? I hate that the rims stick out up front and that they are tucked in the rear. I am running a Supercharged 454 and want to get some real meat under the back while keeping the fronts under the fender welds. FYI I have fender flares so that gives me an extra 1" to work with. Also this is a street truck so no mud tires or lift kits.

 

Greetings rr, welcome to the Forum.

Given that 9" Rims are not OEM for your truck, what you need to do is...
Evaluate how much clearance you have to work with.
measure your existing Inset (from the inter Bead to the Lug Plate),
and make an evaluation on just where the 9" center should be.

Be careful though, you really need to get all your Tires the same diameter,
or it's going to really conflict with the 4WD.

 

Welcome to the forum.

Also you need to consider the clearance to the caliper.

Have you dynoed it yet?

 

We have put a new jasper engine in my 98 Silverado and keep having problems with it. It continues to foul plugs on #s 5 and 7 and occasionally on 3. I think that is what it is that's causing it to miss out and a loss in power. I have had it at 5 different mechanics a total of thirteen times including 2 GM dealers with certified techs there. I'll try to list the things we have done,

fuel pump and filter
plugs and wires
throttle body
mass air flow senser
injector kit
02 sensers
head gasket
distributor cam
ECM
and several different sensers and plugs that I don't all remember on the engine