Adjusting Rocker Arms

[86GT]

I have Crane 3/8" stud mount roller rockers for my edelbrocks. Lately they've a couple on the passenger side starting making more noise than normal, so all my friends said I should tighten them up.

Yesterday I took off the valve covers and tightened them up, using the method they all told me about. Making sure the lifter is on the heel of the cam, rotate the pushrod with your fingers and tighten til you can't rotate the pushrod anymore. Then screw the lock nut in, and viola.

Well today, I'm still having problems with the car running rough and feeling like its missing. ( I've only drove it around the block, just to see, that way I won't mess things up too much I hope). Anyways, between downpours of rain, I mangaged to check the passenger side, and get those fairly well, now it runs a bit smoother, but not the same.

I need some advice here... Should I just start fresh and do them all again? Or just check the driver's side first and see? I just hate doing that side cause I have to remove the upper intake (Edelbrock Performer w/ 3/8" spacer) and then get to the vavle cover. Any thoughts? I will also check my plugs out as well, just in case... Sorry for the length.