I HAVE A 79 ELKY WITH AN ORIGINAL 395 4BBL CARB
I WHEN TO CHANGE MY FUEL GAUGE SENDING UNIT AND THE STRA WAS RUSTED TO THE TANK (TO MY SURPRISE) NOW I NEED A NEW TANK AND NOT SURE WAT SIZE TANK TO GET

High quality Ni-terne plated steel gas tank with 3-year warranty
Applications:
Caballero: 1978-84 22 gallon, gasoline engine
Caballero: 1985-87 22 gallon w/o F.I.
Diablo: 1978-84 22 gallon, gasoline engine
Diablo: 1985-87 22 gallon, w/o F.I.
El Camino: 1978-84 22 gallon, gasoline engine
El Camino: 1985-87 22 gallon, w/o F.I.
Features: Filler neck installed
Capacity: 22 gallons
Dimensions: 38-1/2 x 25" x 10-3/4"<---MEASURE YOUR TANK AND COMPARE
Free with Tank: Rubber O-ring and lock ring for sending unit
Packaging: Boxed
Part Number: GM-515http://www.quantaproducts.com/images/GM515.jpg

Check it out here, found this info in 1 minute with Google search (http://www.quantaproducts.com/prodinfo.asp?number=GM-515)

isn't there a 17 gallon too

I guess there is, but I doubt a V8 has the small tank? Have V8 = need more gas.

Your are going to have to measure it and compare the size to the data in my other post.

I have a 78-79 GMC Caballero parts catalog and it does not tell you which models had either tank.

the early 80's came with either or depending on what plant

search that site, it has the info on the other tanks.....

best bet do a search on the number stamped on tank or give it to me my buddy is parts manager at a chevy dlr



High quality Ni-terne plated steel gas tank with 3-year warranty
Applications:
Caballero: 1978-84 17 gallon
Caballero: 1985-87 17 gallon, w/o F.I.
Diablo: 1978-84 17 gallon
Diablo: 1985-87 17 gallon, w/o F.I.
El Camino: 1978-84 17 gallon
El Camino: 1985-86 w/o F.I.
El Camino: 1987 17 gallon, w/o F.I.
Note: Except diesel engines
Features: Filler neck installed, without pan in tank
Capacity: 17 gallons
Dimensions: 38-1/2" x 25" x 10-3/4"
Original Part Number: GM# 47550017
Free with Tank: Rubber O-ring and lock ring kit for sending unit
Packaging: Boxed
Part Number: GM-517C