If it were me, I would consider how and how much you will be driving the vehicle. Depending on how you drive, ie cruising, hauling, roding, sunday driving etc., original seats can be used with today's unleaded fuels and one can reasonably expect to loose 15 to 25 percent of the seat life. If it is something you will only be using to show off and a weekend driver, then I wouldn't bother with the expense of changing the seats.