A little update, Ordered a 4-2-1 manifold for the car a few weeks back.
When it came i thought id pull the the heat shield off the standard manifold just to make sure I wasn't going to come into problems when changing it....and i found this


So the strip began


My boss had a look at the ports on the new manifold and suggested trying to bring them out a bit as they were smaller than the head

Out came the primer as a guide



I know it wont do much but surely can only do more good


finally with everything fitted (timing and fueling readjusted)