Can someone place this where it belongs?

Hi,*

I'm thinking about customising my Iron 2012 tank, or buying a old tank to customise.

I want to lower the tank, so deepening the tank tunnel. I would also want to make it a flat bottom.

I have NO technical experience, i do have a buddy that owns a metal shop. But i dont want to bother him to much.*

I cant find any information on this, maybe you guys do ?*
Any tips and info are very welcome !!!

Can i buy any peanut style hd tank ? (i will make the fuel pump fit)

This is the style i'm looking for:http://www.google.be/search?q=hidemo...320&bih=356#i=