i have been running a predator solid cam. been in the mix for 17 years. different blocks same everything else. moved the cam from 104 in steps to 110. took it from 10.70s to best of 9.89@134mphit was 262 265 with about 620 lift at 1.6 and it lasted a good many seasons. it just got freshened up due to me taking it to him and pitting on the lobes. but i now have a new modern fast ramp lobe cam to put in. with a little less duration at 258 but i am told it will act like a bigger cam. so we shall see. i did not want the cost of roller either and i am at the limits of the rules on time and my chassis.