klassic motion it seems like you have just answered al my questions in one paragraph mate...
the orginal tranny on my datto is manual so i do not think there will be relay that will need to be jumped i guess..
as for the colum cover i had two 510's one was missing a chasis number so my bro n me used it for spare parts it had the colum cover mentioned..
i looked for the trannys mentioned by datzenmike but the only problem is where i come from the most common datsun that was sold here back in the day was the 1200 ute n the 120y sedan parts for them are easy but the 510 240z is a pain in the fanny to find..bt the fs5w71c will be easier to find...i know just the wrecking yard to rob lol..thank you again guys for your help further info is still welcomed though lol..