If your anything like me, now is when you should hit the "see all steps button"
Step 1: What you'll need
One damaged crankshaft - I used one from a Pontiac 400 that I ruined the rod bearings in, but a v6 crank may be a more suitable height.
Harmonic balancer - This should match the crank you are using ideally. Mine was junk, as the machine shop operator labeled it.
Proper bolt and washer to connect harmonic balancer to crank - I had to call a dealership to find out the size of the bolt so I could get it at the hardware store, and found a washer that would work after drilling it out.
Flexplate or flywheel - I had an old flexplate for an automatic transmission that wasn't proper for my set up (I could only use 4 of the 6 bolts). I had other options, but they are actually good parts yet. Also need the bolts to attach to the crankshaft.
Wheel spacers - These may be unneeded, but I needed something to take up some slack, and I was never going to use these again.
Screws - This was my method of attaching the seat to the frame, I didn't use washers with mine (the first time) but I highly recommend it.
Scrap 3/4" plywood - This is what will make up the base of the seat that attaches to the frame.
Foam or padding - I recently took apart our old worn out bed so that I could make use of the foam, there are many things that would work well here. I used 3" foam cause I have a boney posterior.
Seat covering - I used a piece of vinyl I had bought a while back hoping it would work in my car interior, but it wasn't stretchy enough for that. Worked well enough here.