Hi Gary,
Best to find a 1964> beetle with seat belt anchor points and see where they go and just put a piece of 4 inch long steel angle under the body then drill a hole thru it and put the nut on the underside...
Seat belt bolts are special items... You can probably buy them anywhere... You get bolts from old cars but getting the Nuts is the problem as they are welded to the body of cars... If You need a hole, just drill it... IMHO...
My Son won't let me drill holes anywhere in his car... Was very difficult mounting relays when I rewired it...
You can always put a plug in the hole later on...
or bolt the car seat to the bottom of the floor under the rear window... it won't hurt being down there... and none will notice... except You... lol...:P:P
I've been to all your threads and no photo yet??
cheers
Lee Noonan
http://comunity.webshots.com/user/vw68autobug
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---