So I have checked for vacuum leaks and even replaced the plugs just in case though it's throwing parts at the problem.
I believe the manifolds did not seat on the bottom side even though they looked great from the top. The guide rings may have been the culprit. I think I will have to remove the manifolds again and and try again. Unfortunately the guide pins on either end are short and make the job harder for 1 person. I will try to enlist an assistant today. I actually need to complete this in order to get hay rolls for the goats.
