i see on a lot of sites that say you have to lengthen the pushrod holes on the sportsman II's in order to use 1.6 ratio rockers. can anyone be a little more specific? i suppose this is a job for the machine shop only? i like most specs of my cam, im using the Comp cams XE268, .477/.480 lobe speration is 112. duration 234 @.050. but i want to increase the lift with 1.7 ratio rockers in hopes to utilize more of the 200cc on the sportsman II heads i plan to use. i know some people would just tell me to get the next upgrade on the cam but is it really a lot of work to make the 1.7's work just fine on the sportsmans? and by increasing the ratio does that change the length of pushrod i need to use ? im thinking about using summit brand 1.7 roller rockers. this would put me right around .576'' lift on the cam for my 357. what kind of horsepower do you guys think i would be making with this combo? I use the edelbrock airgap rpm manifold, edelbrock 750cfm, 1 5/8'' headers with 2.5'' pipes and H crossover. should put me right in the 400hp brakcet right?