One more time! It's titled, tagged & insured now as a motor home. Motor homes come from the factory just like ambo's with no rear or no body at all on class As. They're called cutaways on the orig title. It took 30 minutes at the licence bureu to convert it to a motor home & get a title & registration then 10 minutes on the phone to get insurance. I just west to the LB & nicely asked what I needed to do & they were very helpful. Box trucks are the same way, only the chassis comes from the factory to a body dealer who put's a box, flatbed, rollback, crane, etc on. I ran a lumber co & bought plenty of trucks over the years. Maybe it's your attitude causing you trouble. BTW your plan of passing off a totally changed class A as stock won't work as the Ins co will want pictures & it may be even then it may be listed as a salvage title if the former owner claimed it. We tried 1 V10 gas on a 1 ton & got 5 mpg empty or loaded. Got a 5.9 112v Cummins & got 24 mpg. Hauled 20,000+ on the truck & trailer &still beat 20 mpg. Try sucking on sweet pickles instead of dills!