I have a question regarding Springs.. 

We have a few passenger vans in the family, some are getting converted
to hardtop campers.
Are the springs from a Westfalia stiffer/heavier then a passenger van? 
Models are 82 passenger van  vs. 84 westfalia(JY donor)
We also have access to an 85 passenger van (not Wolfy)

And just to verify
Syncro front springs are not interchangeable with 2wd?
Are syncro rear springs 'taller' then passenger model springs?

Thanks for your time and help

Dan in NY
4th salt city VW show 8-12-07
www.vwccny.com