[Tigers] seat belt anchors

[Rollright at aol.com]

Hello,
 
More snow in New England. Sunbeam is all  tucked away, still.
 
Because of this, I need a small piece of  information.
 
What is the thread of the seat-belt  anchor bolts and the recommend length 
of the  bolt threads?
 
I plan to remove the simple bolts and  install eye-bolts. Saw it on e-bay 
and thought,   Why  not!
 
Won't foul the seat belt down by the  floor any more.
 
Anybody know?
 
Jim  Armstrong
Mk 1A 
382002083
LRXFE