MP .528 Solid Cam Upgrade???

I think the MP should be degreed. You are giving some up IMO now because i'd bet the cam is in retarded. If you want to change you need to know where the pistons are in the bore (deck height) to figure the compression in order to figure out the camshaft to run.
Totally agree, that cam if degreeded in properly, should run fine on the street.. ran one for a short while in a 360 and was surprised at how mellow it actually was