ok. I have this tank:

http://i19.ebayimg.com/02/i/02/14/c0/5a_1.JPG

Its a 31 gal. tank out of a blazer but I dont know what year. I fabbed this tank into the back of a Scout and am in need of a fuel sending unit. Ive been looking at my catelogs and have found several different sending units. Some have 3, some have 4 ports and they have different senders for different year blazers.

What are the differences in the units? Can I pick any sending unit and put it in this tank if its for a 31 gal tank? I noticed that pre 78 units are about 80 new and after 78 they are about 160 new. in 87 they go up to 330 because of the intank pump. I will have no clearence problems above this tank and plenty of room for any port combonation. Will any sender fit into the top of this tank? I already bought the lockring and it says it works from 73-91 so that should mean that all they 31 gallon fuel sending units should work, the differences is the port configuration.

Can somebody confirm this before I spend 80 on the wrong sender then turn around and have to spend 160?

n/m got it all figured out.

I am interested in this swap because I also have a scout.If you could please post some pics and more info.that would be great better yet p.m. me if you could but i'm sure it is great info thanks.

Ive got another guy asking about this swap also. Ill get some pics posted of it. I lost my picture hosting server so I gotta find another one.