Space is an issue and I cannot fit the larger 709 in place where I want it to go.
The 709 unit has a twin V belt pulley clutch on it and I would like the same on the 508.
So if someone wants a larger air pump, please contact me.
And some pictures for those of you who like pictures

This is the SD709 that I have.

This is what I want to swap it for.

A Sanden SD7B10 that I will use in place of my factory air con unit, this one is much smaller. I want to retain the on board air con and to squeeze the air compressor between the factory air con and alternator means I have to downsize something. I cannot see an issue with using this smaller AC unit.

The three units side by side. SD709, SD7B10 and the Factory unit.
