My 1939 Chevy 2 ton COE has a 2 ton 1980 P30 front independent suspension with factory disc brakes & the older wheel bolt pattern. The truck was a 1980 Chevy step van (bread truck). The frame rails are identical to my 1939 COE's P30 frame rails. The axle width is also same as my 1939 wheel width. But with power steering, independent front suspension & power disc brakes. If I had chosen to leave my cab on the 10" pedestal it sat on originally, my 1939 cab would had mounted on the newer frame rails perfectly, even the holes for the older cab pedestal was in the correct spot on the newer frame. Everything would had hooked up with very little modifications, such as drilling holes for the step-vans hydra-boost master cylinder to mount on my firewall, & a hole for the step-van's swinging brake peddle rod to inter the cab. Only real modification would be to shorten your original steering column to except the linkage that brings it to the steering box, "original stepvan steering column linkage". Or you can use the steering column from the stepvan which also also mounted with no modifications.
You can find those older 1980s step-vans sitting around for next to nothing. But then you would also want to rebuild that front suspension? Or since the frame rails are identical, you could keep your frame & add the front suspension to your rails. But you will still need the steering box & master cylinder..... That's another option...
see my suspension in my photo alblum

Last edited by OLDSCHOOL CHEV; 01/25/2017 7:41 PM.

Darrell, W.L.
1939 Chevy COE tow truck/My Stubbed toe
1939 Chevy 2 door Sedan

Car chat means talks about Chevy's. All other car makers only build transportation.
I don't work on my cars, I entertain my self in my garage, so my nabor tells me.