My Best friends father was GM at Santa Barbara Datsun in the 70's and we hung out there a lot, in 75 my sister bought a new B210 HB
I bought a 510 2 dr from a guy with a bad trans and broken rings that had used it for a movie they made in film school in SB.
I replaced the trans and rebuilt the motor in the 510 and worked on it a bunch.
Bought my sisters B210 in around 1980 and auto crossed it with good results.
had a guy blow a stop sign in 1983 and total the 75 B so I bought a 78 B210 GX off the used car lot that
my best friends dad, who now owned a dealership in Oxnard, gave me a deal on.
At this time I bought an beat 521 to go with the B for a parts runner and made friends with a couple of guys into Datsuns.
they had a Roadster, 521, 510 and a 1200 coupe.
I swapped most of the speed parts of the 75 to the 78 and ran auto-x and rally (Starlight and others)
until I sold the B and bought a 73 240Z.
mean while I found a 620 with a bad carb and distributer for $150. to replace the 521.
I gave it a good tune up and added a weber DGV, good as new and had a great shop truck while
building the Z with a 5 sp., L28, suspension and all the goodies a road rally car needs.
Then a super clean 73 620 came into my shop overheating badly. The owner left it at the shop and took off.
after a few weeks the owner couldn't afford to make the repairs, so I bought the truck for $100 and an extra $20 for the new radio
he had installed. turned out the block was cracked. I built a LZ24 on 240Z SUs and swapped in a 5sp.
That truck evolved onto a 85 720 4X4 chassis, I had that truck for over 20 years.
Don't have a Datsun now, but on the look out for an A10 sedan.