I have a 75 American Clipper on a Dodge B300 chassis (360 engine). The starting issue is something I'm going through. So far, I've replaced the ignition module and the coil, and I've tried bypassing the resistor, but am still having issues. Once I GET the clipper started, it runs great, and most of the time, it starts up great. But every once in a while, I just can't get it to start - no spark. We're looking at the distributor now. It's a trial and error process and until it's resolved, I do have to be careful how and where I travel (don't want to get stranded in the boonies).
I do recommend that you have the fuel lines tested for leaks. Better to find the leaks now and replace all the hoses, than to wonder why you keep smelling gas and are only getting 4mpg.
The hitches on the clippers were added after market, so many of them were just screwed into the wood, etc. Definitely have it checked out before trying to tow (or carry) anything. They can be reinforced, etc., but get it done by someone who really knows what they're doing - you don't want your Suzuki rolling back home.
