If you put a TT box in an na car the speedo reads incorrectly ( different rear diffs and different size cog on speed sensor) at the time i did mine there wasnt a fix, think Jeff might have found a solution since then
You need to get a vacuum feed to the clutch servo, a lot of people just T off the brake servo line, but i think its worth fitting the extra pipework and resevoirs nissan used ( meant to fix problems with intermittent vaccuum levels and other things) i also think it protects the servo ( around the time i did mine a lot of people were getting servo failure after conversions) a minimum of another non return valve would stop brake failure in event of clutch servo leak.
Dont you also need to replace half the prop shaft ( with one off the same wheel base car)? Im sure i did