Adjustments after installing headers?

[32 Chevy]

Today we installed a set of Headman headers on the Son-in-Laws 78 Mustang II. It has a 302 in it with a slightly warmed over rebuild including a factory 4 bbl manifold and Edelbrock 650 cfm carb.

Before installing the headers it started and ran well, but now with the headers on it is hard to start and stalls almost every time you let off the gas.

So, I imagine some rejetting, timing changes or other tweaking is in order. Any suggestions on what to try first?

Thanks,

Dave

[EMSjunkie]

.

Before installing the headers it started and ran well, but now with the headers on it is hard to start and stalls almost every time you let off the gas.



Dave

Did'nt happen to knock off a vacuum line :?
just my two cents worth. gotta start somewhere, usually the simple stuff comes to mind first.

V ance

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No Kitty!  thats MY POT PIE!...........NO!  BAD KITTY!

[32 Chevy]

.

Before installing the headers it started and ran well, but now with the headers on it is hard to start and stalls almost every time you let off the gas.



Dave

Did'nt happen to knock off a vacuum line :?
just my two cents worth. gotta start somewhere, usually the simple stuff comes to mind first.

V ance

Nope, that's the first thing I thought of too. All the vacuum lines are O.K.

Dave

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No Kitty!  thats MY POT PIE!...........NO!  BAD KITTY!

[enjenjo]

Well I would get a vacuum guage, and start with resetting the idle, and checking the timing, then you can get into jetting later when you have an idea of where to go.