I installed Edelbrock Pro-Flo 4 on my Wagon.. love the system.. Have it on my 540 in my Charger as well.
Seems some love them and some never get them dialed in properly.
Any mpg improvements?
With Wagon, yeah a little, but driveabilty are way better.
Charger, huge improvement on mileage and way better driveablity..
Only time I ran a carb on this 383 was when I broke it in, otherwise it was EZ-EFI 1.0 (2.0 was way overkill for what I had, but regret not getting it now).