Just wanted to introduce myself. I'm 32, live in eastern Massachusetts, and I'm a bit of a Nissan/Datsun nut. My first car was a 1993 D21 2WD, lowered. I've also had a 1996 Maxima SE 5spd, 2008 Frontier 6 spd, and now a 2012 Xterra Pro-4x 6spd that I wheel.
I bought my first Datsun 6 years ago, a 1968 Roadster 1600 that I've been restomodding for a while. Rebuilt the R16 and trans, along with pretty much everything else. It has a "big brake" Altima/Volvo conversion on it, and dealer option Appliance mesh wheels. The body has been repaired before and is rough, but it looks good from 20 feet or so.
On Monday I picked up a 1971 521 and have been starting to go through it. A lot of the ball joints boots are melting (seems to be a common Datsun theme) and the king pins are a bit worn but not horrible. The body is in decent shape, aside from the rockers. For the time being, I'm going to redo the horrid brakes (they don't look like they've been touched in a while) and think about a disc upgrade in the future.
I ordered upper control arms bushings, new brake shoes, KYB gas-a-justs, and tension rod bushings to get me started. The king pins don't seem to be much of a safety concern, so I'll put them on the list for later.
Future plans: Hella e-code H4's w/relay re-wire, GM 1-wire alternator swap, front lip, lower it, and first gen Frontier 6-spoke wheels.