Several guys on the GMC site have used it. I think they used the Dodge one and it requires some machine work, I think to the front bearing cover. I'd try to look it up for you and get a link but you'd need to be a registered user to open the link.

"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.