new gas tank on a c10?

i have a 1965 chevrolet c10 and decided to move the gas tank from the cab to the frame. only problem is i'm not to anxious to spend $400 on an aluminum tank. does anyone know what tank might fit in between the framerails? thanks in advance...

i used a 15gal 87 s10 blazer tank its between the rear rails

do you have any problems with it sticking out too much below the framerails?

Why do you need to spend $400?
http://store.summitracing.com/partdetail.asp?autofilter=1&part=RCI%2D2151AS&N=700+115&autoview=sku

will the one from summit go in between the frame rails

The dimensions are there....

an exact fitment tank measures 27 1/4" by 19 1/2" by 9", the one in summit measures 20" by 18" by 10" and costs 200 less, not too bad. i still got to check the one from the s10 tough