Ok well I have the 550 injectors and the idle should not be too hard to achieve, keep in mind i have about 20 hours here and there of adjusting idle only to find the best combo. I spent a whole week working on the idle before i dropped the new motor in.

Dino is on the right track. since you installed the MS and motor at the same time then run the motor through break in on the factory Fuel. Breaking inthe motor while trying to tune is a real bad idea. You will have a lot of time tied up in the idle and the consequence will be a motor brokenin by idling forever.

On that motor what is your vaccuum?

Good idea working on fuel only first, its the best way.

This shouldnt be too hard just time consuming
Terry