I got a rb20 im puting into a '89' 240sx dose anyone know the legnth of the new driveshaft I will need Im using mckinny motor sports mounts

 

RB20 uses stock 240SX driveshaft.

 

as long as the car was a manual tranny to begin with. if you are converting while doing the swap you need to pick up a manual driveshaft somewhere.

 

Thanks I knew you could with the skyline crossmember but I didnt know with the mounts

 

the mounts shove the motor back a little tiny bit so it takes up some of the slack you would have if you used the skyline X-member. I make my mounts a little different than tophat or McKinney so you have about half the amount of play, but if you stick an LSD in you arent smashing everything together. My mounts are right in between where the R32 xmember and tophat mounts put the motor, about 3/8" instead of 3/4 .
good luck on your swap, hope you have fun doing it.

 

Alright well thanks for the info