Find one that looks good and duplicate it. You will probably find that there is no such thing as one that looks good and end up adding suspension parts that attach to the original frame or updating the original suspension (which is what I would recommend). Charlie Stephens
What's wrong with the original frame? I'll bet you can't give us a good reason, no one else ever has.
I just put a customers 36 Plymouth truck on a s10 frame and the first problem is the s10 frame is about 10" to wide to fit under the cab, by the time he paid the bill for me to narrow and box the frame, make the frame the right wheel base , build cab mounts, running board mounts, we where no further along than the stock frame he had me take out, I would use your stock frame and put a nice ifs and ford 9"
Chassis Engineering makes everything you need to hang any suspension and drivetrain you want on your stock frame, and no other frame will fit it like the one King Henry V8 made for it.