I have been reading this forum for a while and enjoyed the high level of competence and numerous interesting threads. I have something to contribute to the pattern wishbone discussion. My wife has a 3200GT as a daily driver with almost 130k kms. For the MoT a rear tie rod and a front ball joint needed replacement. I thought that with the age of the car new ball joints, bushings and tie rods would benefit the road holding and give an as-new experience. The January discount on Eurospare pattern wishbones was therefore most welcome.
As we know, the pattern 4200 Coupé rear wishbones do no fit in the original 3200 forks.
Original
4200 Coupé is meatier
All 4 3200 forks are symmetrical. The 4200 Coupé has a symmetrical fork at the front and an asymmetrical one at the rear side of the wishbone. When I ordered the patter wishbones from Eurospares they confirmed that they would fit the 3200 without a problem. When this turned out not to be the case (no surprise to this forum I suppose) they said the 4200 forks should be used. So my mechanic ordered these. The asymmetrical rear ones (Part# 196522) do not fit because the mounting point on the subframe of the 4200 has shifted compared to the 3200. The solution was simple. We used 4 front forks (part# 196521).
Original setup with 3200 fork and wishbone
New setup with 4200 Coupé fork and wishbone
The only difference is that the wishbone is mounted some 0.5 cm higher compared to original. However, the factory-prescribed geometry can still be obtained and the car drives perfectly, at all speeds.
Best to buy parts from Eurospares when not needing any advice.
I hope this is helpful.