wheels tubbing a pickup

I am doing the bed panels now on my truck, and after cutting away about half of them because of the huge amount of rot, I will soon be welding in new metal.

I am planning on putting wheel tubs back there so I can get a wider wheel in the back. I've never done anything like this before and was hoping someone may have some suggestions.

Like should I find the wheel center and cut out a radius a few inches greater than the wheel size I'll use?

How about modifying the bed? Has anyone done a pickup like this with the wooden beds?

The best way to do it is have the wheels and tires on the pickup that you will be running, then you know there won't be any clearance issues when you're done.

The best way is to mount the actual wheel diameter that that you will be running, (a plywood disc the same diameter as your fully inflated tire will work well here, drilled with your wheel bolt pattern and bolted to the axle flange with wheel nuts.) Check to see what your maximum suspension travel can possibly be,from desired ride height to "bottoming out the suspension and make your radius for the inside of your wheel tub equal to the maximum tire radius plus the suspension travel to "bottom out mode" plus 1 1/2". Just be really sure that your radius cut-out in the side of the bed doesn't extend beyond the area covered by the bolt on rear fender. If you find that it does, then you will have to go to some form of suspension travel limiter on it (a rubber bump block) so that you can decrease the radius. You will have to form or weld on a lip around the outside of the wheel tub to support the wooden floor.

that'll get me started
thanks guys

I'll give you some one elses Ideas,HE! HE! HE!

~ Vegas ~