1. Did early 4 speed cars only have one coat hook?
Mine appears to have come that way from the factory and was a November 67 built car. There is a hook on the driver's side only.
2. When installing the carpet does the driver's side vinyl (heel pad?) extend up to the gas pedal or under the gas pedal?

Thanks in advance.

The original carpet in my 68 Coronet had the carpet heal pad positioned under the gas pedal.

2 coat hooks and the gas pedal is on the corner of the heel pad. There should be a cutout on the bottom and there is a hard 1/2" thick styrofoam spacer uner the pedal.

Thanks guys. I'll check under the heel pad for the cut out.
Now where did all my energy go? LOL

Original carpet...

Yes the picture helps a bunch and the template idea is excellent.
I should have paid closer attention to my original carpet when I removed it but at the time I planned on storing it. A couple of years later I threw it out - big mistake.