nbs chevy raised gas tank ???

i know that someone has probably already ask this but im a little new here and havn't every seen the post but anyways how hard is it to raise the tank on nbs chev. or would it be easier (cheaper) to get a fuel cell?

i did mine a month ago,not too hard just cut out old x members over tank and replaced them w/2 inch pipe,notched the lip on the back cab wall 2 inches and reused the old hangers for the straps