I installed that tank on my 66 galaxie convertible 9 years ago. I used st-f47 tank straps from classiccarautoparts. From what I remember, Had to roll the entire top flaps at the seam where the tank meets the car and the bottom flaps where the straps cross the seams. The edges of those flaps at the seams are very sharp. Even with the flaps folded down, the edges cut through the rubber liners for the straps. It was a tight fit but the tank fit. Haven’t put the car on the road so I can’t speak towards rubbing or any other issues. Hope this helps.