I shortened the one on my '56 with a cutoff saw and a mig welder. I have had no problem in over 6000 miles. I may be "unknowledgeable" about how it's done in a "real" shop but I have done several over the years. Never had problems with any of them.

I say if you have the tools, try it. If it doesn't work, take it to a shop.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.