Yes, the hump must be ground. There is a very good discussion on the Old GMC site about that and other changes that need to be made. You'll have to register then go to the discussion forums and do a search.


"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.