The cab and chassis trucks are not a "solution" to your swap problem. The only thing they are good for, and have always been good for is a donor for the dana 60 front axle, or a donor for the dually adapters so you can use them on a regular single wheel dana 60 axle and convert it to a dually dana 60 front axle.

You still have to do some modifications to your frame. The overall front frame on your 2wd is 90% the same as a 4x4 front frame. The largest difference is the 2wd has coil springs, the 4x4 has leaf springs. The modifications you are making to your frame are to accommodate the 4x4 leaf springs.

To mount the rear of the spring, you need the spring mount bracket, and you need to drill a few holes and mount this bracket. To mount the front of the spring, that is were the shackle is located, and the very front of the frame needs to be notched out for clearance, and another frame bracket needs to be mounted to mount the shackle. Besides drilling and mounting the steering track bar, that's about it for frame modifications.

Plan B would be to buy a shackle reversal kit. These kits are made for 4x4 trucks, and they are designed to move the shackle to the rear instead of the factory position on the front. So they give you a large crossbar bracket for the front mount, and the small custom shackle brackets for the rear spring mounts. Along with this you get a little lift also. So for the 4x4 guys it reverses the shackle, for the 2wd conversion guys it also reverses the shackle but it also gives you brackets and a little less frame modifications on the front.

 

 

Here's an example of the reversal kits you can buy.

https://www.skysoffroaddesign.com/co...ford-fsrob-002

Here's a place that sells aftermarket adapters. They are not cheap.

Adaptors, Wheels, Duality Fenders and Complete Kits - Arrowcraft :: Helping You Handle the Road for over 30 years!

Don't forget the track bar, and if you end up with any lift, you will most likely need a dropped pitman arm and a dropped track bar frame bracket.