they will fit, but it will look stupid.

I installed rear syncro springs for a cross country trip pulling a
trailer with a Subie powered Vanagon.  Even with a 2000 pound trailer
the van was still riding way too high...

http://i275.photobucket.com/albums/jj285/baboonia/syncrosprings.jpg

you could try springs from a 1985 2wd van, 1985 was the highest
springs for 2WD vans...

>Will a set of syncro springs fit on my 84 gl 2wd?  How much will they lift
>it, if any?  Adverse effects?  Thank you!
>
>Brendan Slevin
>84 GL Totoro
>Bend, Oregon