Edelbrock Performer RPM

It's a great manifold. If you have street gears keep the divider. If you have 3:91:1 or better have the center divider milled down to 1/2 inch tall. You lose a little bottom end, but in the mid and high range it will have better distrubition and make more power. 600 to 750cfm carb and a 1/2 inch spacer. I have run this combo to the high 11's.