TC carb questions

[Art King]

I am finally getting around to installing a new set of TC carbs supplied to me by Burlen Fuel Systems a couple of years ago. Two questions arise in planning what needs to be done in setting them up: 1. The linkage supplied by Burlen is basically a coil spring connector that I've never seen. I'm only familiar with the usual W links. Anyone have experience/advice about the spring(s)? I think can use the perfectly good set of W links from the old carbs, but wondered about the ones Burlen included. 2. What metering needle specs should be used with US unleaded gas? Thanks, Art -- Art King Bethlehem, PA