i have a 1973 240z that i bought and now the transmission (5th gear) is not working... not a big problem.. i know that this transmission is not the factory one bc its not a 4 speed... when i dropped the trans it had 280zx sport written on the outside with a marker... so here is my main question.. how do i know what rebuild kit to buy for it? i understand that there are two different types besides the borg warner and i know that its not that... the only thing i can find is #5-10-31 that was put on there when it was made... any ideas guys? 0