I need to save my little weber sermon so that I can just cut and paste it in here, but here goes: I fought my carter for 80k+ miles and finally replaced it with the weber a year ago--best $325 I could have ever spent. Tune it one time (one mixture screw--can't get easier than that) and forget about it, 18 mpg with 30" tires, and it's both strong and consistent/reliable. Do the nutter bypass at the same time so that the computer won't tamper with your distributor advance, then set your timing around 9-degrees at idle (with ported vacuum off the passenger side of the weber).
for a good deal on it (no, I don't work for them or anything
, just trying to help you out).