I currently have a '74 400 in my '68 with a '68 intake (#9790140). The engine was rebuilt (stock) before I bought it and now has 20,000 miles on it. I want to swap out the intake with an Edelbrock Performer Aluminum series (#2156). After reading and research, several folks have stated the original cast #9790140 is as good as the Edelbrock. I am also currently running the Edelbrock 1406 carburetor.
Should I switch? If so, what improvements other than weight will I see?
