Scrapped the rear idea.
Exhuast placement as well as no spare ....
Looks like i'll either be going with a custom 10" wide tank (47" long x 10" tall " 10" wide) for $360 shipped .....
or
http://www.tanksinc.com/index.cfm/pa...rod/prd128.htm
together with their intank pump.
Most concern is the driveshaft obviously based on pic above. So might need to mock that out.