ARE THERE ANY AFTERMARKET FLOORPANS AVAILABLE FOR THE 1977 SPRINT CLASSIC? IF THE CAR IS BUILT ON A CHEVELLE PLATFORM, WILL THE CHEVELLE FLOORPANS DO THE TRICK?
they should,tho you might have to do some mods to them.
floor pans from a chevelle are not the same I have a 1976 GMC Sprint and you can get them for 1973 to 77 Elcamino GMC Sprint .I bought mine through the part source here in Canada they come in 4 section's front and backs.
http://www.elcaminostore.com/catalogsearch/result/?search_year=1974&q=floor+pan&x=25&y=10 Hope this helps...