Swapped to 528 mech cam slowed down

Mopar 284/.528 mechanical. I like that cam. My low compression .030, 340 went over 114mph with that cam regularly. I also found .026 and .028 as best lash settings. It made the most power (mph) at .026/.028. The previous cam was the Mopar 292/509 hyd. I HATED that one. I didn't have enough compression for it. Engine made only 4" of vacuum and with auto trans. the low end was terrible but @3800 it would explode..I actually had people asking if I was using nitrious..I wasn't. Changed to the '653' cam (284/.528) and vacuum went up to 10.5" and it was a whole different car. Wonderful on the street and it flew at the strip. 11.60's were normal, and most runs were over 114 mph. I shifted at 6800 and it went thru in high at 7100. I special ordered a set of Harlin Sharp roller rockers with 1.65 ratio that gave me as installed at the valve with lash .538 lift. Joe there's nothing wrong with the cam you are using, it will work you will just have to tune it 'in'. Your 60 ft. is off because now you are blowing your tires off...get the suspension dialed in and it will run the numbers. Good luck, Terry.