Seat Belts for Task Force

[thumper56]

My 56 1/2 ton is almost finished inside and out. Working on interior and want to put in some seat belts.

1) If I just go with lap belts, where would be the suggested area to bolt to floor?

2) If I go with shoulder harness (preferred), any ideas of where to attach the shoulder bracket without having to tear cab back apart? Of course want a strong installation.

Wish I thought of this when cab back was off- could have welded in some support!@#$%!

Truck is a small window with gas tank still in cab.

Thanks!