Datsuns make GREAT street cars! I used to have a '71 240 with a 350 chevy stuck off in it. With the all-iron smallblock, it weighed 2460 lbs. It ran high 11's with ease on 9" slicks and a 3.54 stock datsun rearend. (r200 rear, not an r180.)
I sold that car back to the guy I got it from, partly because I just don't like traditional smallblock chevies very much, and partly because I needed money at the time.