1972 Rotted Frame At Rear Coil Springs

[daveytruck72]

I am for looking guidance on how to repair the frame of my 1972 Cheyenne. Rust has rotted the frame where the Rear Coil Springs mount to the frame. The bottom of the C channel is rotted along with the reinforcements which are riveted to the crossmember.

I have looked at various other sites and youtube but havent found any remanufactured parts or knowledge. Really hate to scape the frame since the rest of the truck seems fine and this is a highly optioned truck.

I have already completed the demo and found a frame to use for replacement parts etc.

Thanks in advance for reply!!