Building a Genset Box for my Pickup Tow Vehicle

I did a search to preclude asking answered questions,, but unless I worded the search wrong, I found nothing.

I am interested in building a genset box for my pickup to hold a 3500w (3000w continuous) WEN-Pro Chinese genset. It's your typical tube-frame 3600rpm unit w/ a 6.5hp Honda clone engine and a 4.5gal fuel tank on top. I normally carry a Honda 2000i, but for Summer use, the extra might be enough to power my coach's 13,500 A/C (haven't yet tried it).

I know that it is much louder than my fairly quiet Honda inverter, but for use in Rest Areas and noisy parking lots, I am sure it won't offend too many folks, especially if I can:
1) Adapt some supplemental muffler after the surprisingly quiet factory unit (compared to many older "emergency" generators.
2) Put the genset into a custom box possibly lined with sound deadening material that has adequate ventilation so the unit doesn't overheat. This may involve side doors that can be removed, that open, or incorporate a 110v fan that (comes on whenever the genset is running and) forces air into one end and out the other, possibly louvered end (for rain protection.

Not sure if I want to compartmentalize it to hold such things as the blue-tote, and other equipment, or have it separate between the equipment box and the 5er hitch.

Of course, one would have to consider the exhaust, not only from a noise standpoint, but the fumes. Perhaps incorporate a venturi exhaust into which the muffler would exhaust, with plug-in sections to get it up high, which could be assembled when parked and stationary?

Anyone have ideas or existing designs who would be willing to share their experiences?

I have access to metal bending and tig welding equipment, and was thinking of making the box from aluminum tread-plate of which so many pickup bed tool boxes are constructed.

Thanks-
Bob

Check out this video on YouTube.

Not the perfect solution, but it'll give you some ideas on building your own. I think it sounds louder on the video than it would in "real" life due to it being under a patio cover with walls on two sides. It would have helped if he played a before and after sound bite.



Cheers!

Here is what I did for my Honda
http://bobbystuff.com/RV/05-01-Honda_Generator_cover.php