Be double sure to check the Sub Frame mounts,,, REAL GOOD!!! On My 93Z34 the mounts appeared to be in good shape,,, on the outside... However when I removed them they were trash,,, rusted and in pieces on the inside... I was battling weird steering issues for years!!! Sometimes it would pull to one side or the other under acceleration or braking... When I did my engine swap I got new ones because I wanted to replace anything that could wear out on the car... Wheel bearings,,, Engine/tranny mounts and any other mounts and basically anything that could cause trouble... Fixed the steering issues!!!
Good luck,,,
Tom B...