Not any progress on the car, but finally I have got the chance to make my measurements for the Bonspeed wheels. Another problem solved and less to think about!
Here's how I did it, it goes as follows..
The first thing I did was to cut some pieces out of wood with the correct measurements for the section width on the tire, I think this is the only way to do it with out a tire or spending a lot of money on wheel fitment tools. I then marked the center of the tire on the piece so I could make my measurements from that. I drilled the holes so I had the upportunity to adjust the backspace a half inch every time I moved it inwards or outwards.
Here's the beginning on the wheel fitment tool to my specs
Now to the fun part. I got the car up on the lift and began to prepare it to measure the wheels. I was that lucky that my rear tire actually got the same overall diameter like the new wheels/tires I'm getting for the rear. So that was easy to lower the rear end to the ride height that I'm expecting to drive with. Maybe it will be lowered a little bit more, but it was fine to make the measurements. For the front, the new wheels/tires will add a little bit more to the overall diameter but not much, so this was also easy enought. The only way I could lower the car, was to raise it from the lift with the two lifts under the car. Then I tightened the car from the crossmember to the lift to lower it in front and from the leafs to the lift in rear. It's important that there is weight/load on the car when taking these measurements, if you don't have that your measurements can be wrong and that is not a good thing when ordering a set of custom wheels!
Here's some pictures of the progress
The car is lowered and ready
I made another piece of wood and bolted it exactly to the center of the hub, the piece have the correct overall diameter from bottom to top, this makes everything much easier. I know the plate is'nt in the center of the white piece, but this gives me even more space to play with! But I tested it after the pictures was taken, and moved the plate to the center of the white piece and no problems here either when I turned it around.
This picture is with a 5.5'' backspace
And this with a 6'' backspace
The same for the front, you just need to make sure that you have enought space between the tire and frame rails and between the fender flares when you turn the wheels/tires lock to lock. Make sure that you clear the upper ball joint too, this don't seems to be any problem with a 19'' wheel if you get to much backspace the upper ball joint will just go inside the wheel.
After all this measuring, this is what I ended up with.
For the front with a 19''x8'' wheel with a 245/35-19 tire, I got a backspace on 3.5''.
For the rear with a 19''x11'' wheel with a 305/30-19 tire, I got a backspace on 5.5''. The rears are a tight fit and makes the outside of the tire 1.5'' or so to the outside of the flares on the rear quarter, but that's how I like it..
I hope you like it, it might be useful if you want something similar sometime..