[Patina Tiger]

Hello group,

Just installed a new set of stamped rocker arms. Set also includes the fulcrum ball and retainer nut. Since there is no formal rocker arm "adjustment" for Pontiac, The retainer nuts are brought to the base of the stud then backed off a 1/4 turn. A few nuts were able to be loosened by finger at this, so they were tightened to base. Top end is oiling fair to good.

OBSERVATION
Engine starts fine but now idles rough.

Next, listening to the exhaust pressure which "sounds" off. I feel both sides of the pipes, driver side is hot, passenger side is cool. . . . . .?

DRIVING
Backfiring quite a bit upon throttle.

Anyone have thoughts on this? All was running strong until now. Reason for new components was to quiet excessive top end chatter.

Thank you for your insight,
Alex