68' 440 Ex.Manifolds to Headers

[tubbedrunner]

what are 1 7/8 headers worth over magnum manifolds?

+ .030 , 440, extreme energy Comp Cam 268 , 906 hds with 2.14/1.88,9.6 comp, weiand dual plane , 68 carter carb, 727, 1800 stall, 3.23

 

[q-ship]

About 25 to 30 horsepower, and 20+ ft. lbs. Torque.

You may have to re-jet your carb to maximize the benefits.