[Tom Kirkham]

The blue springs have typically not been a problem. However they don't let the advance come in as fast as I would like it.

The MAP sensor can be hidden out of sight. Just run a vacuum hose over to it.
The MAP sensor is just a generic GM sensor. Due to emissions laws, all of them seem to be good. The connectors are Weatherpack. You will want a MAP sensor that is rated for 1 atmosphere.

With the O2 sensors you should be able to dial your system in very quickly.