your heads are big cc on the intake port you will have to run it pass the cam i would not run the hydraulic rollers are heavy the will be hard to keep them on the cam it hi rpm in the mud try some thing like 685 /685 269/279 @0.50 on 108 or 712/715 278/288 @0.50 on 108 if you run 4 1/2 crank and if you must run the hydraulic try a custom howards but i would not run the hydraulic roller at hi RPM or you will be sorry