woot!!!!!
well this has been sucessful, thanks to all the guys here. I swapped the valve body out of the 30 42LE i had from the supra (since that was shiftkitted) into the 30 40LE. with no dramas.
as stated i transfered the C-0 accumulator to suit the 342 valve body, also the oil lines for the rear.
but this box works fine, for the first time i have driven my supra. the shift kit even works normally, nice quick almost cluncky shift from 1st to 2nd.
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