I have a 1971 merc888, Ford 302, R outdrive. I need to replace the bellows and gimball bearing bur am confused as to what to do with the shift cable before remving the bell housing (drive unit off) Do I pull it back into the boat or leave it where it is? Do I need to remove the brass nut at where it passes through the bell housing? I've checked Seloc and Clymer as well as Mercstuff and other sites, but am not quite clear on the procedure. Is there a good source for the special tools?