Question to Extended Cab owners or who knows about gas tank sizes

[Papawoodi]

My question is what size gas tanks do the extended cab trucks have (16 gal or 20 gal)? Little history if you might not know, I am rebuilding an 1986 extended cab that came with body and interior only. I have a chance to buy some nice tanks but they are from a short bed truck and my understanding is those are 16 gallon. Are those the size used in the extended cab C10 trucks?

[zieg85]

Since the extended cabs were originally longbed trucks and longbeds had either one in them I would say if the price is right snatch them up.  I have twin 20's in mine but if one ever goes out it will be replaced with a 16

[Irish_Alley]

from what i understand short beds did only get 16

[Papawoodi]

Yea the price is a good one and plan on buying them. My donor truck is long wheelbase and found out the tanks are rusty. I measured them yesterday and they are the 16 gallon ones, so all should be good.
Thanks for the input, just did not want to buy something that will not work.

[Dan75k20]

The 87 k10 in my shop only has 16 gallon tanks

[Jheald65]

Just to confirm , they can be either 16/20 right ?

[zieg85]

yes, same as any regular truck with an 8' bed