what do i have hydraulic or solid lifter?

pull the valve covers and if you have the stamped rockers then you have hydraulic and the preload not lash should be about .040. but the main thing is why do you think you have to adjust yours? did you just put the motor together or is there valve clatter, etc.? once its been set you really should never have to reset it. also if your assembling it do yourself a favor and take one of the bolts and match it up at a hardware store for some grade 8 bolts. much less likely to break.