smoker/bbq

This was once a 275 gal tank. If you ahve a welder i will make you a step by step on how i did it dont have many pic but i could make some sketches

Basically I cut the flights out of the center use them for the Firebox welded the two half round sections back together cooker is 25 round by 58 long giving you a 25 by 58 cook top and a 58 inch long bar in the top to hang meats.

I used 3/4 by 9 expanded metal and rebar for my cook tops
As you can see under the butts hear

And i know i have way to much exhaust lol
But you could easly use this set up for reverse flow by putting a plate in the bottom and moving the exhaust to the other side

http://www.feldoncentral.com/bbqcalculator.html

This might help you with doing the math on what you'd need and what sizes of material you'd need.

http://www.smokingmeatforums.com/a/reverse-flow-smoker-how-to-calculate-build-tutorial
I didnt use this but if I would have know about it I would have