Well, I went ahead and "downgraded" back to the HS6s. My float bowls immediately flooded over, but once I got that straightened out, all was good. I still can't quite get the mixture correct, but with the HS6s on, the car ran and accelerated very well.

I recently picked up a Unisync Carb Tool on eBay and I finally had a chance to try it out. Seems that my rear HS6 SU was *way* out of sync. Getting it adjusted was a snap with the tool. I'm not sure why everyone is so "down" on them... 'Course I spent a whole lot less than $50.00 on mine. :)

Anyway, it seems that the HIFs were the culprit. I suspect that they could be made to work, but I'm nowhere near competent enough with Carbs to try at the moment. It's a shame really, they are very nice carbs.

Soooo, stil trying to get the mixture to a the leanest w/o making the car run like molases. I think it's a bit rich now (two full cranks down from the top), but I'm not sure how to tell. So any advice here woudl still be appredicated.

Thanks for all the info so far!
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1967 P220 Amazon, 1972 145S, 1976 245 DL, 1983 245 DL, 1986 745 GLE, 1990 745 GL, 1995 945....
You mean to tell me that Volvo makes cars that are *NOT* Wagons?!?