Points for 66 273 dual point
I never even set gap after about the 3rd set of points. I just simply "guess" then check dwell on one set "on the starter." Sometimes I would START it on one set and recheck the dwell. Then set the other one for total, I don't remember, anymore I think I "aimed" for 38 degrees.
My old V code 70 6bbl, and for the first few years, the 71 340 engine both had DP. Also had a hemi tach drive DP that I ran in a couple of engines. I had a part time job back then at the NAS Miramar hobby shop helping guys out on an Allen tune-up machine / scope.