"Some" play in the cam plate is normal. Updated cam plate kits are available.... and recommended if TPS faults or mismatches are occurring.

When checking WOT position:

Disconnect throttle cable at engine.

MANUALLY advance throttle arm (ENGINE OFF, PLEASE) to the WOT position. While holding arm against the WOT stop... see if the roller will move away from the cam "further". There should be APPROXIMATELY 1/16" of additional travel before the throttle plate stop contacts the throttle plate (this additional clearance is important to ensure that excessive wear does not take place).

If additional travel exceeds 1/16"... the WOT stop (behind the VST) can be adjusted to achieve appropriate travel. This adjustment is BEST made while monitoring throttle position on the Computer Diagnostic System (or a DDT).