post 16 of this thread shows hole location and dimensions for 67-68 tow hooks..
they're mounted open to front, I thought they would be more useful open to the rear
thread was also locked for some reason so further input was muted
http://67-72chevytrucks.com/vboard/s...d.php?t=218219
my 72 K1500 Burb has holes in the frame for them but my 71 K20 Burb doesn't..
neither have tow hooks on them [big surprise based on the market value
] or on the spids..
but some trucks did have them in their spid so those were installed at factory or dealer modified spid?
I have some 69-71/72 hooks I can try on my 72 to see how they fit..
If they mount properly, I'll try to sketch the hole location dimensions in a picture..
good luck!