Enjoy the motorhome.
There is a chance that the distributor is not working at the correct level anymore. Stretched springs, leaking vacuum advance, and other things can prevent the RV from making the power that it should .
A place like "Clutches Unlimited" in Midway City CA can rebuild the distributor and make at least as much power as it made when new.
Check the rims. Probably do not have the R - for Radial rims with a circle around it (indicating that Radial tires are acceptable for this style rim! ) The first generation of radial rims had some problems, and could not use radial tires to their 'full rated' capacity listed on the rim. Later designs had more weight capacity, and have a circle around the R.
Good luck!
Fred.
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com