Your ahead of me though. I picked up our '76 B210 coupe at the local wrecking yard a couple years ago after seeing it there one day, and mentioned it to my wife. She used to drive a honeybee, so she said we should buy it and she wanted 50 mpg minimum!!!
Our '76 still has the 3.89 axle ratio ( I have a 3.54 for it), and I have a 5 speed, but need the rear trany mount and cross member. I also have a 1980 electronic ignition distributor, but am running points for now. On the axle gears I was waiting to see if my A12 engine could pull the car around the way it is before going to the taller gears.
What do you think Mike. Should I just toss 'em in??
I took apart the 4 speed that came in the car, it was nearly like new, so I decided to run it for now.
When I worked as a Datsun mechanic 1977-1980 the 5 speeds had 5th gear and reverse problems. The factory came out with a repair kit that fixed the 5th gear nut coming loose problem.
I'm building the car to be a daily driver, groceries, stop and go traffic, up to the ski hill, etc so it has to survive. I'd like to think I could at least match the 50 mpg the 1977 B210 ad boasts about.
Last summer the wrecking yard near here crushed a '72 1200 coupe and a 74 B210 2 door with the A13, and I'd planned to take more parts!!! All they think of is keeping the lead sleds. I'll have to start a project post even though it's not a 1200 or a ute:)