That monarch is a good old school cam for a 440 dual plane 9.5:1 a little headwork and headers. Should be 108 LDA and I put it in +3 at 105.

Was replaced by the Crower HDP (hydraulic dual pattern-asymmetrical) series in the mid late 80's (IIRC) that were a little quicker off the ramp but really didn't make any more power. What you have is a good one in between a 484 and 509 purple shaft like the old 30306 Lunati but with a choppier (nastier sounding) idle and a bit higher rev potential than the 509, whatch your P/V clearence if you don't have valve reliefs.