[mgarblik]

I have owned and worked on a fair number of tri-power set-up over the past 30 years. I hope my comment isn't too vague to be any good. I remember using accelerator pumps from late 1970's Buick V-6 engines. The old 231 engine before they went to the dual jet. The advantage was they were shorter and had a stiffer spring on the pump body. This would position the plunger higher in the bowl and the stronger spring would push more fuel before compressing the spring. I wish I could be more specific on that pump. I will look in the next few days and see if I still have one. I do remember this mod was helpful on my 421 HO car with a fairly hot cam.