Denny,
Thanks for the information about a coir mat being used and the confirmation that the material that I found will work. My butt will forever thank you. I'll use the matting material in the two trucks I am restoring, a '54 Chevy pickup with Unison seat, and a 54/55 GMC COE with two single-person bottom cushions.
Regarding the dual-action fuel pump's vacuum-line plumbing, did you find original documentation regarding the plumbing (I know you are a stickler for detail)? The Factory Assembly Manual does not seem to have a good drawing for 3100s.
As always, Thanks,
