Silvia front stuff for a number of reasons including parts availability, easy 5 stud, easy big brakes, readily available modified knuckles to our specs, wider track whilst still retaining a low scrub radius which makes steering feel much better, power steering etc. etc.
Keen to hear about the geometry problems you mentioned. Still in early stages of build so open to suggestions. If 2 of those problems are bump-steer and ackerman, that will be sorted with custom knuckles.
Will be running modified knuckles to increase lock, reduce turns to lock, reduce ackerman and correct bump-steer. The inner and outer tie rod pivots will be parallel to the inner and outer LCA pivots for the least amount of bump-steer possible.
The inner pivots definately need to come up to raise the front roll centre which goes very low when lowering. The rear doesn't do this so un-corrected, the balance of the car is very over-steery.
Yep handbrake will be sweet as-is. Maybe thicker cables.