Gas tank for a 72

I was thinking about replacing my gas tank because its so small, I think its only a 15 gal tank. I heard that a tank from a 73 - 75 was a 20 gal and would swap right in. Any info guys?

Won't fit.

and the 68 to 70 have a 18 gal tank...71,72 have a 16 gal tank, so i would go with the 68 to 70 tank...

and the 68 to 70 have a 18 gal tank...71,72 have a 16 gal tank, so i would go with the 68 to 70 tank...

Found this one, states its for a 71 and 72 and its 18 gal, what do you think? Not sure its worth all the trouble for additional 2 gal... If it was a 20 gal, I think I would do it.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=015&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=250236869707&rd=1 (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=015&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=250236869707&rd=1)

heres one cheaper

Thanks! I wonder if they make one that fits in a 20 gal?

I dont think it would be worth the trouble of swapping out the tanks just for the 2 additional gallons of gas.

after 72 they went to a 21 gallon tank

I dont think it would be worth the trouble of swapping out the tanks just for the 2 additional gallons of gas.

I agree... Too bad they don't make one in 20 gal to fit. :(

I agree... Too bad they don't make one in 20 gal to fit. :(
I know what you mean if i could find a 25 gallon tank that would bolt right in it would have been done along time ago, the 18 gallon tank can be a pain but think on the positive at least when we fill the 18 its a little bit less painful.