[Rev]

Glad I was at least some help. I'm really only a fellow hobbiest. Now to the the new problem. If you have a vacuum leak, it can really only be iin some few places:

1.) hoses

2.) carburetor/manifold

3.) Manifold/ head

Check carefully in all those areas using spray on carburetor cleaner at idle around those potential leaks. If the idle improves when spraying , then you may have found the air leak.

The most difficult leak to find is at the intake / lifter valley gasket interface. If an air leak is indicated and no other place can be found, then you may need to pull the intake and look there (last resort).

Rev