65 327 header a/c question - Impala Tech
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post #1 of 3 (permalink) Old 10-06-2016, 08:14 PM Thread Starter
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65 327 header a/c question

I have a 65 Impala convertible with a 327. It has factory air and power steering. I am installing a set of Summit ceramic coated headers on it.
Looking to see if anyone has installed headers on a factory a/c set up and if so did you run into any issues using the original brackets etc. I am going to swap in the aluminum compressor to lighten it up a bit.

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post #2 of 3 (permalink) Old 10-06-2016, 09:29 PM
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Jim are you talking about substituting a Sanden Air Conditioning Compressor for your Harrison compressor?

Problem with headers on these engines with short water pumps is the exhaust manifolds provided the structural strength to mount these accessories that are not available from a stamped steel bracket. You may get it set up and aligned, but odds don't favor it staying there. That and many headers exclude power steering and air conditioning compressors in the foot notes on the application page.

A set of large ID rams horn cast iron manifolds will flow as much exhaust gas as tube headers on the street. Get above 4,800 RPM and the header starts to flow more air. But considering how little time is spent at that RPM you have to ask your self is it worth the hassle.

Big Dave
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post #3 of 3 (permalink) Old 10-07-2016, 05:46 AM Thread Starter
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Hey big Dave
No I'm keeping the original Harrison style and size compressor the one I'm using has an aluminum body so it's half the weight. It has all the original dimensions and basically attaches the same way as original.
The set I bought has not arrived yet but they are supposed to allow for power steering, alternator and a/c. I think they will fit around the steering gearbox ok and with a little stiffening of the included alternator bracket that should work too. The headers do say they allow for the hooking up of the a/c compressor but I think that may be the challenge.

As for why I'm changing the original exhaust ram horns to headers......my wife has let me build any and all projects I've wanted over the past 26 years. The 65 Impala is all for her and I'm determined to give her whatever she wants for this build. In her words the ram horns are ugly and the ceramic headers are much prettier and sound better. So there ya go.

Thanks Dave for your input. I think a little fabrication is going to have to be done. I was just looking for someone who may have already went through it.
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