[forestb]

"do away with the vacuum booster if you plan to keep your engine".

Do you mean that using a booster will damage the engine or do you mean that I will have to make the decision between my brakes working (while using a booster) or changing the engine?

I think my next step is to wait and see how much vacuum I end up having after the engine is properly tuned and then start changing things if I am still not getting enough vacuum.