Not to offend , Nippon send this car to this shore as an economical GT, there for all initial data is not that well documented as these tin cans are not an EXOTIC automobile .
@ Kerrigan, don't feel bad by forums contributors, forums are composed by all kinds of personalities , some are good nature and others are radicals in their interactions . Been fried by the in clan of a forum is the norm , so take it for what its worth . Good luck with your Z adventure.
At that coin , grab it . Do a few tlc items, like , work on stance , put a 5spd , change the muffler , put an era type set of wheels and fatter tires ... and , enjoy the ride. PS-- that top looks very much like the ones on convertible GTO replicar .