The mixture was bang on right out of the box. Conversely, the lower runners provide more room for a more generous plenum and a better transition into the ports, but the high runners are hampered by a shorter, more abrupt plenum on that side. Find all posts by stroker mike. Password Mark Forums Read. If you could go from 12 to 15 mpg you were happy. I also notice the difference between the two the other day also. I have used the holley intake and didnt like it at all.
I like Edelbrock's Victor on the standard head.
Aluminum Holley Strip Dominator Intake Manifold for MOPAR Small Block 340 360
Further enhancing the high-rpm ability of the single-plane is the shorter runner length. It is a good candidate since you remove the face anyway. I agree on the bennies of the AG. Right now real money to me is anything over ! And the thing really screams.