Quote: X3 on the Holley SD intake! And like I said in my first post, change the intake when you do the heads. Or just the intake alone to start with.
The Holley SD and the Edelbrock Performer RPM run nearly identical even though one's a single plane and the other a dual plane. I ran the 2 back to back, same day track test on my previously mentioned 11.4 sec combo and they ran nearly the same. The RPM slightly faster down low, the SD slightly faster up top...and I do mean slightly. Could hardly tell a difference driving it. The Holley just happens to be a lot shorter and fits much better w/ stock hoods.
I think the difference comes into play on the street with lower RPM's
And like I said in my first post, change the intake when you do the heads. Or just the intake alone to start with. 