Another Or Same Header Question

[Jim Hanig]

Originally Posted by impstocker

Ok, How important are equal length headers? I have time, not a lot of $ for new headers so I plan on using my Hooker Competition 2.0 inch headers I ran on my 68 with the 396/325 HP combo I will be using again in Stock. The longest primary pipe is 37 inches but have a shortfall back 2 cylinders. These are "street headers" that I modified with a better collector. Does the fact I run a stock dual plane manifold which I guess are unequal length runners really negate any gains from a equal length header?

Will Lamprecht
65 Impala 396/325 I/SA

Will, i did a test several years ago on the Dyno at Mike Trumbles a 396,375 with the header like yours then swapped the for a set of stalhs . the engine picked up 12 hp. about a tenth at the track.they where both 2" with 3.5 collector I think you need a smaller 1/7/8. or maybe a 31/4 colector. look up cone enginnering they sell all sorts of header parts.