You had an adapter plate on it today when I looked at it?

If MPG is the goal H pipe as close to the collectors as possible. 2 1/4" - maybe 2 1/2?"

What is the specs for the valve lash? Set it cold tomorrow to the hot spec. If you get out there when it warms to 20*

Where did you set the cam?

"The only thing to do for triumph of evil is for good men to do nothing"

"NUNQUAM NON PARATUS!"