Tim - secondary butterflies are gone and holes plugged off. Main butterflies are solid.

Jim - The temp. compensators do an excellent job on the good pair and would not want to remove them. Actually the biggest reason I prefer the HIF. We have temperature swings throughout the year from -10F to 100F and I've yet to adjust the HIF for "winter" or "summer".

Rhys - It is possible that the floats are somewhat low. I did intentionally do that after hearing "hot soak" stories and ways to avoid that problem. Did the same on the other pair but don't know how much lower without taking the good pair apart which I'd like to avoid right now.

So you are saying that it is probably suffering fuel starvation. But if the floats are too low why would it smooth out when flooring it on the highway? Also, why would the float level affect the jet height at idle since the bottom of the jet is submerged anyway?

I'll open them up again and raise the floats. I did try that before and it still had the same symptoms but that was before the manifold was re-surfaced. Maybe it will work correctly now.

Thanks everyone for the input.
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'60 544, '68 220S, '70 145S, '72 144E, '86 745T