If you are going to install new seals then I would replace the dryer and
the expansion valve (as new ones are made for R134a) and also blow out
the lines and put Ester oil in the system and compressor instead of the
old mineral oil.  I have a kit for the A/C retrofit that includes the
o-rings, fittings, and oil that you need.  Also the dryer and expansion
valve are on my site as well.  Works very well on the newer vans (86-91).

Ken Wilford
John 3:16
www.vanagain.com

John Rodgers wrote:

> My AC compressor case brackets wore through and I need to get it
> remounted. I see that there are an extra set of mounts on the other side
> of the case, which will allow me to mount the unit upside down, but in
> the same place. Only thing is, the pipe that comes out of it. will be
> turned upside down, with the filler valve on the bottom instead of on
> the top. Is this going to present any kind of problem other than
> access??? I getting ready to convert to 134a.
>
> Also, what parts are recommended for  this coversion to R-134a? I know I
> have to install new seals, and have the system evacuated thoroughly.
>
> Thanks,
>
> John Rodgers
> 88 GL Driver
>