Iv'e been following this and similar threads for the past 10 years... Obviously I'm not the only Westy owner who is unimpressed with the handling ( gross understatement ?
The only change I've made is replacing the stock Michelin LT tires with XPS Rib ( no discernible difference in handling ).
The combination of height and relatively short wheelbase are both a blessing and a curse. A blessing because of maneuverability and efficient floorplan. A curse because it's vulnerable to cross winds.
The old VW bug's and bus's - and Chevy Corvair - all suffered from similar poor handling because the engines were in the rear.
When the ratio of weight between the front and rear ( center of gravity ) is shifted to the rear the front wheels will lose the ability to control the vehicle. Try steering a motorcycle while pulling a wheelie
The addition of a heavy air conditioner on the roof , a heavy generator under the floor, a 3 gallon water heater, 9 gallon black tank, 200 amp 110VAC to 12VDC power supply for the air condtioner and heavy spare tire and carrier on the rear door all move the CG to the rear. Thanks a lot Airstream:-(
Several Westy owners who have removed the roof air conditioner and generator have commented that the handling was much improved. Moving the spare tire from the rear door to it's original location under the floor where the generator was could only help.
I also notice a difference in handling between driving with empty holding tanks vs full ( worse when full ).
I weigh my Westy every year during my 4 months long summer travels at various public weigh stations along my route. It's always about the same - IE: 4,800 rear and 3,500 front.
It would be interesting know what the front/rear DRY weights are on a James Cook Westy vs NAFTA Westy and what the difference in handling is?
Perhaps the moral of the story is:
"An ounce of prevention is worth a pound of cure"
OR
"If it ain't broke don't fix it" ( Yes Airstream - I'm talking about you! )
John...