I did alot of searches before posting this. I am planning on buying a 1j front clip to do my swap. What are the differences in the 5spd that comes with the clip and us r-154 as far as gear ratios-abs sensor? I know that the bell housing and flywheel on the two transmissions is different, but can I use my 7m-gte clutch with the 1jz? If I got a torsen differential would I need to change the speedometer for accurate readings?