More progress made, as the passenger seat bracket holes were drilled (studs were rusted) and the stock brackets look appear to fit perfectly.

However the driver’s side holes, due to some previous patches and brittle metal, aren’t visible. So, I am attempting to estimate their location. The rough distance I measured is from the front of the hat channel bracket just behind where the seat posts rest to the seat brackets shown below. The 16 1/4 inches might be a little short. Anyone have the correct measurement for a circa 1960 FC-170?

Here is the driver’s seat from underneath, per Will’s question:

Here’s an example from another FC-170 with the same brackets (from this post):

Passenger seat:

Some pics from this weekend’s progress. The first is the completion of the flip-down fuse box. Fuse boxes often have to be put in awkward locations, so I thought I would try a flip down box, which stays hidden most of the time, but can be dropped down with a single long pin removed (still need to make that pin, but the two small bolts do the trick for pics).

I really don’t know how well this will work, but figured it was worth a try.

A closer look at the fuse box bracket. The hinges are some kind of cabinet door hinge (I think); Dad had a container of these hinges for some unknown purpose.

Here are some pics of the accelerator brackets. The one on the left acts as a guide for the accelerator cable (the red/green wire is a stand-in for that. The left bracket also acts as an anchor point for the spring. The right bracket rotates, in this perspective, clockwise when the pedal is depressed. The bolt and spring acts as an adjustable stopper for fine tuning.

Not the best pic, but this shows how the gas pedal connects to the hem joint, how it goes through the floor, and how it then connects with the cam bracket.