Ric;
I went down to Lowe's and went to the weird fastener drawer. I bought a handful of things that were threaded inside and had spikes on both sides that dig into the wood as you tighten them. I drilled the seat pan to match my sliders then screwed the bolts up from the bottom of the seat, into the fasteners. When everything was tight I marked and pulled the bolts one at a time and cut them. In retrospect threaded rod might have given me a little more wiggle room.
Bill Stradtner
Bill Stradtner, Portsmouth, VA
427 S/C #9442
427W Dart "Replica" Ford Engine