[Mikemuir]

Managed to sneak some time out of work and have done a few test runs.
Blue cam didn’t make too much difference.
Hooked up vacuum and noted that hesitation/bog and backfire through carb all happening around 2 or less vacuum
If I keep vacuum in the 10’s when accelerating the motor runs sweet.
Really do think that I need to be looking at low vacuum problem because this is where all the problems are occurring .
Even on 1/4 throttle vacuum is dropping below 4
Maybe I should be checking lobe lift on cam next to confirm cam is ok?
Next step I would think would be to check cam timing
One other thing I noticed when I put new inlet gaskets in was that there was no valley tray fitted . Is this a problem?
I have now gone through a can of carb clean so believe I can rule out any vacuum leaks around the top of manifold and carb.
What are your thoughts?

Cheers