Place a 2 x 4 across the outer bottom of the seat buckets and with a jack, apply pressure to help break the body loose. DO NOT apply any lifting pressure anywhere aft of the center of the rear wheel arches.
Once the body has started to move, slide a piece of conduit (thru the rear wheel arch openings) across the area where the shoulder belt brackets are located and tie the lifting rope or cable to the conduit thru the holes in the body that the shoulder belt brackets came thru. I will send you a picture if you send me your email address.
Larry Meadows
lmeadowsw@yahoo.com
813 634 8559