I recently found myself bringing home a 1974 R90 /6. I have a 75 R90s and enjoy having a spare Airhead. It has the 4.3 gallon gas tank with a dent, motorcycle is running and riding very nice but I'm considering having the dent repaired over the winter. Do you think I should hunt down the 5.8 gallon tank? Not a big fan of the rubber knee pads...but I could get use to them. Anyway the Manza Blue is kinda nice.