Zoomob, Perhaps with the # of "Restorations" etc, I have experianced I 'could" attempt to pass myself off as "at least "knowledgeable". But I won't... Instead, I offer this. Seat foams differ in "density" from year to year and manufacturer to man... model to model etc.... some pads are/were of single construction, others were either "holed" or had "inserts" of different density. If i had a "good" "non ducktail" seat, w/approprioate padding" I see no prob w/ "spliciing " in padding to fit tail. on the other hand, if your pad is "shot' the odds of a "uphoulstry shop " having a "foam" which even cut to fit would be acceptible is "doubtful:, luck G