i this mz20 witha 7mgte.. now i've been considering swaping over to a manual.. apart from a new ecu etc.. does anyone know of a possible 6 speed box to put with it?? im sure toyota had a 6 speed ma70 supra or something?
Toyota has a couple of 6-speeds, but good luck getting it to fit behind a 7m. Buy a 2jz-gte and 6-speed (V160) in a jza80 front cut and ditch the 7m and auto.
Or get the R154 5-speed with clutch, pressure plate, flywheel etc and fit it. It'll only cost 2-3 grand
Or sell the Soarer and buy a manual Supra.
ASAIK there was never a 6-speed ma70 supra. (Unless you count Stenno's car with a 2jz and 6-speed conversion!!)
You could in theory put a V160 6-speed behind a 7M, but you'd need some sort of adapter plate to make it fit (the V160 doesn't have a separate bellhousing). The better option is to do a JZ conversion (either 1JZ or 2JZ) and the V160 will bolt right up.
EDIT: expect to pay upwards of $3-4k just for the V160, and then you'll need to modify it to fit (shifter is in the wrong spot), then you'll need a custom tailshaft, custom transmission crossmember, and the list goes on. By contrast an R154 can be had for $2-2.5k and will bolt right up with factory parts.