Datsun 240Z (early series) Mustache Bar Bushing Replacement and Associated Hardware hints. Recently I undertook the project of replacing my Mustache Bar (MB) Bushings and freshening up the associated mounting hardware. This installation was for STOCK Nissan parts and not URETHANE or POLYURETHANE types which call for several different steps and parts. The step where you remove the actual bushing from the MB is the point of No return, as far as whether to use STOCK or URETHANE bushings. The car t