it would pull vacuum at wot throttle with the edelbrock.
At what RPM?
Above 4k is when it really started to show, I bought the 750 off of a guy that said it wasn't enough for a 383 Chev which I doubted but it doesn't seem like it's really enough for a 440 with a dual plane. I played with it on the rollers for a few hours and tuned it in, but it was always down from the thermoquad.
