1973 360
Do you remember the specs for the cam that you used?
It's the Mopar Performance 761 cam, gross duration is 270/272, lift is .450/.455. I've seen strange figures for the lift at fifty for MP cams, because MP just muliplied the gross duration by .85 to get a duration at .050. I think the real duration at fifty is something like 222 on the intake and 224 on the exhaust. That cam is no longer produced.
I put it in my 360 back in 1991 to replace the so-called Hemi grind cam that was a dog in my low compression 360 which at the time had factory heads, factory 340 exhaust manifolds, stock torque converter, a Torker intake and 3.23 gears. Switching to the milder 761 cam and an MP dual plane intake got me down from 14.50 to 14 flat. Then a Performer RPM intake and Turbo Action 11 inch converter got me down to 13.70s. Left it that way for years, then switched to TTI step headers, their 2.5 inch X-pipe exhaust, Indy LAX heads, an air gap intake, and 3.55 gears. The 62 CC LAX heads and thin gaskets bumped my CR to about 9.5 to one if my calculations are correct. All that knocked off another 3/4 second. At this point, it could use more cam. And better pistons, too, even though the CR isn't half bad, it's not a quench motor. The short block is just a backyard rebuild; the block has not been decked at all, cast pistons, factory rods, the rotating assembly has not been balanced, and I'm not sure I even degreed the cam.