Does anyone know the differences between pre and post 74 tanks? ie is the 75 and later wider at the front (in the tunnel or outside width), is the tank longer, etc?
Will a cap and locking latch assembly from the older fit a newer?
Also is the petcock at the same spot (as in position front and back), just opposite side as the tanks that have the petcock on the right side?
The reason I ask is this:
I bought a tank, the older style and was able to cut down the pucks and mount it to my 550 k0. I called a few paint shops for prices and they want TOO MUCH money to paint one

. I found a junk yard to paint it for 100, but I cannot get the bondo perfect on it and it would really bother me having wavy sides on the tank.
Anyway, I came across a local guy who is selling the tank pictured above, he'll throw in a petcock and cap too, it was blasted (inside and out, it was cut open, blasted, welded, pressure tested, and sealed at a radiator shop) and then painted professionally. He wants significantly less than it will cost me to have filler work and paint work done on the tank I fitted to my bike.
Problem is he lives a a little farther than I'd like to drive, and if the tank wont fit my 550, then I'm kinda screwed and will be out a few hundred dollars.