I want to replace my Holley 4150, 650 cfm, tower numbers 1850-9, 0416, I assume it's an older model from what I've read. It runs great but leaks, i have a rebuild kit and might work with it later, but I want to buy a new replacement. Engine is an internally unknown 312, 1.54 rockers, flat top exhaust manifolds, MSD, and a BT intake, I want an easy to adjust carb, to use a current phrase "plug and play" if thats available. Thanks for any suggestions

Ted, Redding, CA