Currently, I think it is about 2 7/8" lower. I'm using some sport springs for a 1302 from Mid-America Direct that I cut two coils from, and reworked the perches so they would fit right. As far as I know, 1303, and 1302 springs will work in pre-87 Porsche 944 struts, as mine did. I will probably eventually go lower, but I need to build the engine and get it in the car first so I can see what rake the chassis will sit at with the car at full curb weight. I want to keep it as level as possible.
The only geometrical difference I can see is the steering arms on the spindles are straight on a Porsche (for the most part), and are curved up, and inward slightly on a 1302. Not sure of the differences between Porsche, and 1303 spindles.
I don't think that I can lower the center steering arm either because the frame head is in the way.
Oh well... we shall see how it drives as-is.
Yeti