Thanks for the advice, guys.

I am already planning on replacing the fuel hardlines and hoses (viton this time) and either having the tank cleaned or replacing the tank. So, I am going to try replacing both filters and running it from the can to see how it goes. Hopefully this is all that is the problem. I suppose it is the most likely at this point...

As to the electric fuel pump: I am wondering whether this is necessary. I was hoping I could get away without one for the sake of simplifying the fuel system. I don't think these engines were installed from the factory with any additional pumps. I also don't want to use an in-tank pump, as I'd prefer something that can be easily repaired/replaced if need be.

Is there a pump I could mount on the frame rail to supply 3-5 PSI that could be removed/replaced easily? Is this required/recommended? Pros and cons?

Thanks as usual....