i took all the measurments today that i need to make my t56 adaptor. problem is i think the r154 ones are a lil off. what i need is for someone with a r154 off the car that has a 7m bh attached to measure the 4 holes ffor me so i can compare. center of the intput shaft tot he center of the bolt holes. when faceing the bh, the top hole on the pass side measured 6.785in, the lower pass side measured 6.66, the upper drivers side measured 6.5975, and the lower drivers side measured 6.5975. i was thinking they looked more conceteric than this. i measured many times to be sure but confirmation from someone else would be awesome. thanks in adavance.