I vote for the Bolt-out set too. They are like an inside ez-out. However if you decide to weld here's a tip. Use a raw biscuit to cover the surrounding area to prevent splatter and accidental arcs.

"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.