So far I like them. I may have a problem with 1 head stud pulling out. Went to torque it to 20 ft. lbs. and it started to spin. Hope this isn't going to happen to all of them. May have to Timesert it. It seams like it picked up good power. Stock stroke as of right now, but by the end of the month I am going to have someone go through the whole motor. My plans are +4 mil , some porting , trans mods and maybe a set of different pipes.