275 Tank Firebox Placement Help

[Johnman6996]

So I started a 275 gallon oil tank build. Going with a three door system, two horizontal and one big vertical. Thinking smoke and rotisserie pig smoker all in one design. Kind of stuck on the firebox and placement. Pictures below of the tank and my rear facing firebox idea. Figured the rear facing box would allow for a better flow of heat and smoke (using the tank shape ala one of the Good One smokers http://thegood-one.com/ ) while also allowing me to use it as a grill if I wanted to. Input appreciated:

Link in case they don't imbed:

https://1drv.ms/f/s!Aj2H15Aw4I-pioN_xVFInoiMVi93nQ

 

[Johnman6996]

Lets see if this one will embed.

 

[Johnman6996]

Going three pages deep = the dead zone.

Can anyone help me out with this design?

The link is to my OneDrive, but I need to finish this up as I'm borrowing a welder and other tools from a friend.

Thanks and God bless!

 

[bjarolim]

Pictures are a little unclear....use feldons calculator to cut half moon outta CC then mount your FB to the half moon cut out