Here's the link to that Layson's converted fill tube solution that JD Mopar mentioned above. Looks like it might be better than cutting up your trunk floor?
Catalog (laysons.com)
LAYSON'S RESTORATIONS - DODGE, CHRYSLER, PLYMOUTH RESTORATION PARTS
I have trouble gassing up my 1964 Plymouth Valiant Signet. The filler nozzle leans way back, causing the pump to shut off even while I'm squeezing the handle. If I turn the nozzle upside down and hold it firmly into the opening, I can get it to keep pumping and filling. But I have to guess...
I got a paint job on my 1964 Valiant Signet and the wiper arm retaining nuts went missing! Anybody know where can I find replacement wiper arm hold down nuts?