Jamie,
All of the mounting points are pretty straightforward except the one for the front seatbelts under the door - this area is enclosed and you will have to get some kind of mounting bracket in there to mount the seatbelt - you can drill holes and use the super large washers that come with the seat belts from most vendors.
My '65 had the mount point in there on the outside, but I added the three-point belt mounts on my '66 (in the roof pillar) and used some brackets from Andover - here
Seat Belt Components,Hardware And Related-Seatbelts4less.Com
look at the reinforcement plates toward the bottom - also notice the size of the washers with the bolt kits.
__________________
Beri Fraley
Strong, Proud and Ugly
If you find yourself in a fair fight, you haven't been trained properly.
I hope this helps..... 
