I bought the Fentons that had been "modified" to fit GMC heads. The only modification I could find was where they ground the flats to stamp 'GMC' on them.

Here's what I had to do to make them fit.



"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.