Each "hinge-pin" is grooved on the end to accept a special "E-clip" ( kind of an E-clip with a built in handle/tab that makes them easier to install/de-install) type of fastener. Pop these off and the seat will slide to the rear (when open) and then can be removed. Make sure you save them as replacing them with a regular E-clip is a PITA...
Ah, the dreaded PITA issue, eh?
Checked -and by using my new R65.org flashlight- found some rusty, empty grooves where the e-clips used to live. The seat on the '83 is held on by the rear storage box... nada else.
Peeked at the '81 and it has one of the "tab" e-clips on the aft seat pin. At least I have a sample of the size needed even if I have to go the "PITA" route. I recall having some of the same clips in my odd-ball hardware collection. What are the odds I can find them and they'll be the needed size? Dream on, Klingon.
Thanks, folks, for the assist. Hopefully, we'll get some pleasant days for shop work before returning to the school house grind.
Still have the eldest son, his wife, and two grandkids here. The dishwasher, washing machine, clothes dryer, DVD player/television and microwave are constantly running... as is the electric meter!
Monte