I am with you slab.I like old crap.
They are way simpler.Do not be missled thinking newer is better.
Trust me,I make my living selling over priced,over complicated parts for 5 year old vehicles.New is only new once.
Stick with the simple tougher rigs.
If it where me,I would fix the stearing,find a used set of 16" wheels(tires are cheaper)replace the fridge ,and stuff a 5.9 cummins turbo in her :good: Bolts right to the torqueflight.I love the style of those old winnibagos.
Acually,a 318 would be a better choice over the 360,(and more original as I assume the rig is early 70s by the PICs)360s where slugs with a load,the 318 seemed to tow better and get better millage.
The good side is that these older rigs are way easier to sevice on the road.Fuel pump in a parking lot,alt or starter on the side of the road,cables linkage and levers rather than sensors,servos and accuators.
Anyone who has ever tried to replace an electric fuel pump(in the tank) 500 miles from home will apreciate the simplicity of a carburated motor.
Remember it takes a weekend to change a broken throtle cable on a 1800.I just robbed the push cable of my 1100,modified it,and used it to replace a broken clutch cable on a yammy XS on the side of the road,and was moving again in less than an hour.
Thats why I will never downgrade from an 1100 to an 1800.
The KISS method :rtfm:
Keep
It
Simple
Stupid
Good luck