[mickmate]

(28-25.6)/2=1.2" drop at stock control arm positions. That's pretty close to the 1-1/2" you're looking for. 28" is a big tire to start with, most of the 15's are around 26.5" dia. I haven't measured the SPF arms and put the data into CAD but they look good eyeballing them with the lower arms being pretty level at ride height and minimal camber change on an alignment machine. The rear uprights are fabricated parts and could be duplicated (or modified) with different height upper and lower brackets but you would want all your measurements off the car and a known good roll center height to draw and then build them to. That article tells why you shouldn't measure fender heights and then lists all the setting by fender height............??