not much else to know,
see here, these aren't modern VIN's that tell you every nit picked along the line .... for other specifics about your year, get a shop manual and a Factory Assembly Manual, both of which are available at the vintage parts vendors
ahh, a 3.5L would be the 216ci and a 3.8L would be the 235ci only place I know does that is
Rock Auto, who have good prices for what parts they list - try vintage vendors, like the Stovebolt supporters
American Classic or
Jim Carter and check other
folks on this list to find what parts are available, most of them will list gas tanks
the ebay tank looks right, but I'd be leery of it unless he'll say where it's made
edit again: I see
Rock Auto has spectra tanks about the same price

Bill