Just thinking here so "Don't Shoot"... Would it be alright to narrow the center section of the sub-frame? headscratch I realize you would also need to narrow the center steering link as well. Doing this you could keep the hub to hub distance the same as original. I'm sure someone somewhere has done this.

~ Craig
1958 Viking 4400
"The Book of Thor"
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1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane