I have a 77 that I am doing a frame off resto-mod and have to replace the rear lower quarters. I am eliminating the reserve tank and installing a new 23 gallon tank with pump for an efi system. The new quarter panel does not have the filler cutout and I want to use the 76 and prior filler with exterior cap so that I don't have an issue mounting Warflares. How do I go about mounting the 76 and prior filler neck/cap assy? Is there a kit available from one of the suppliers? Thanks!! Gary