[9secfirebird]

to make vortec heads accept any sort of lift around .500 you need to change the springs and with that you should do the seals, might have to make some room for the springs to fit. then you have to machine the guide boss down, then rocker arms for aluminum roller 15s is around 250 from summit. roller tip rockers arent really the best. if you decide to go with a stamped rocker you need self aligning ones, still expensive. stock rockers that come with vortec heads are garbage for any sort of cam around .5 lift. then after you get the springs and seals and do machine work and get the rockers you need to but screw in studs and guideplates would be a great idea. however once you do screw in studs you have to get the boss machined down to accept the new studs. we dont want pressed in ones coming out now. so even if you do the pressed in stud work yourself your still talking costly. even if the heads are only 100 bucks guideplates are 15 bucks, edelbrock springs for the heads with dampners in em are 100 bucks or so, dont wanan run cheap springs and have em break 30 bucks for studs, 38 dollars for seals and orings, and then you gotta add up machine work for em. plus the rockers for a good roller set your looking 225. oh yeah and if you go 1.6s you have to do some work to the heads too