Hi, I own a modified Fiero, it has a 2.8 block from a 85 Celebrity with heads from a 80 Citation. Im using an Edlebrock intake manifold made for the S10 truck and a Holley 390cfm 4 bbl carb. Im not getting good mileage with this carb, the most is about 20mpg, and low end power is weak. The intake manifold is a 2 piece design with 2 different interchangeable tops. This allows for the use of the stock 2bbl (Rochester??) carb or the 4bbl Holley. Ive seen a Weber carb that is a bolt on replacement for the 2bbl OEM carb, does anyone know anything about it?
