Cleaning out a gas tank

+1.. buy a new one

Tim, I know your time is more valuable than wasting it cleaning out a tank worth less than $100 new!

Eastwood sells a chemical etching system to clean the tank - it cost's more than one of the new American Designers tanks. Just buy the new tank.

I'll add another vote for a new tank. It will save alot of grief later.

I wanted to go with the extra capacity tank like that but was worried it would hang down and show under the valance. Does yours hang down?

+25 on the new tank! One for my '73 is gonna cost $179; but it would be worth it to keep cam break-in from being cut short by a big goober of the nasty-smelling cr@p in my tank clogging up the carb.

From what I can see/read; you "pre-71 guys" have it easier in that the mods to re-angle the Mustang filler neck for a Cougar are a lot less extreme than on the big Cats. On the other hand, the last place from which I looked at a gas tank, was selling the 71-2-3 Coog tanks for the same price as the Stang tanks; and the drawings indicated they were definitely NOT the same tank for different vehicles.

As for "upsizing".... I were in your situation; I'd be willing to lose an inch or so of trunk depth if the trade-off was a couple more gallons of fuel!