My car now has the Edelbrock Weber 8867 on it now. After helping a friend out he gave me his Holley 600, along with the rebuild kit(decided he didnt want it) I have a 400 in my car. I do want the Holley 750 but got other things to worry about first

Now what would be better, keep the edelbrock on or put the 600 on the car. I got a friend whos very very good with them and will help me through the process of installing.