[Jeff Higgins]

Well jcge, even if your conclusions are not "gospel", I arrived at the same ones looking at that diagram.

pjh69911, I'm thinking the lower part load is still controlled by the center "idle" spring. I think the outer, intermediate weight spring is the one I will make my initial adjustments with. With the main rack set where it is right now, the A/F shows a gradually leaning condition as rpm's climb over 4,000 and approach 6,000 (as high as I wanted to go on the new motor). So the current plan is to lean out the black screws that control that outer intermediate spring.

In the meantime, I've come up with an easy way to do this quickly on the dyno. Yes, the oil does drain out of the mixture screw cover; that o-ring only seals the cover. I found it is very easy to simply remove the upper right governor assy cover (the big one forward of the warm up thermostat, with the three screws). I simply snake a small rubber hose in past the flyweights and use the same pump I use for putting gear oil in the tranny to suck the oil out.

The two screws holding the small adjustment screw cover in place can be removed with a small, flat, ratcheting screwdriver. The one on the right will not come out all of the way before hitting the fan shroud, so I shortened it about 1/8" so that it would clear (actually had to loosen and raise the pump to get it out the first time). The long screwdriver normally used for the part load adjustment works great for poking through the fan and shroud to turn any and all of the five screws that I may need to turn.

Anyway, I'm "staged" for my next dyno session. I can drain the oil from the pump and easily access the screws. I'm going to try to get in later this week. I've been working on some of those other "little problems" inherent in putting a 3.0 in an early car and putting MFI on it to boot (non functioning tach, alternator/fan/shroud offset, etc. etc...). Everything found in the initial "shake down" runs has been addressed. Now it's back to the dyno...