Hello Harry-We have an 85 with a Bostig conversion (love it!) and a hitch.  We started with a standard GoWesty version which bolts to the two U-hooks.  That is now for sale- Just $150 and it is yours!!  Email me if you want to purchase the first version GoWesty bolt on hitch.  Guaranteed to work with your conversion, if the U-hooks are still present.
Ultimately we shopped Craigslist and found a standard truck hitch that nearly fit our frame.  Then we took it to our trusty welder in Mexico who modified it to fit the frame and wrap around the engine.  With this, we have a sturdier hitch, and a wake-up-rattle when we start the engine, as the muffler box rattles on the hitch! We wanted to tow a little more weight and felt more secure with this mod.
Geneva and Mike in AZ

> I was browsing GoWesty's site looking for a trailer hitch for my van
> and noticed the one that they offer specifically states that it won't
> fit on vans with engine conversions.
> 
> Anyone with a bostig conversion that has a trailer hitch? I'm looking
> for recommendations of what works.
> 
> Cheers,
> Harry