Quote Originally Posted by John Palmer View Post
Vacuum leak(s) on the rear?

Tight valves, not adjusted correctly?

Carbs not sync'd?

What was the compression like? High, low, uneven?
The compression was good and even thoughout the cylinders.
The vacuum connection for the master cylinder was on the section at the rear of the manifold maybe it's been takeing vacuum away from the rear 2 cylinders