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Old 11-19-2020, 11:10 AM
57Chief 57Chief is offline
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Default 57 - Exhaust manifolds 455

Looking to see if someone here has put a later model Pontiac motor in a 57 Pontiac? My main question is has anybody used long branch manifolds from RARE in this application and did you have any problems clearing steering box? Any responses are welcome even if you used other manifolds but Im really wanting to use 2.5.

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Old 11-19-2020, 07:21 PM
694.1 694.1 is offline
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I have long wondered if a right manifold would be the ticket for the left side? Let us know

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Old 11-19-2020, 09:20 PM
Goatracer1 Goatracer1 is offline
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I installed a 400 in my 1957 Chieftain using factory manifolds but NOT ram air/HO manifolds.

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Old 11-20-2020, 02:52 AM
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Jack Gifford Jack Gifford is offline
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From installing RARE long branch manifolds in my GMC (with '55 HydraMatic case)- I'm guessing the long branch manifold outlets will collide with the rear engine mounts. I had to remove the GMC crossmember and build a custom crossmember and engine mounts, which is now a very crowded area. The driver's side is even more crowded.
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Old 11-20-2020, 02:56 AM
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Jack Gifford Jack Gifford is offline
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Quote:
Originally Posted by 694.1 View Post
... a right manifold would be the ticket for the left side?...
Umm... with the outlet aimed up at the firewall, or aimed forward?

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Old 11-24-2020, 11:07 AM
57Chief 57Chief is offline
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Thanks for all replies. Still hoping someone will respond who as actually done exhaust manifolds on a 57 with later model motor.

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Old 11-24-2020, 11:32 AM
694.1 694.1 is offline
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"Umm... with the outlet aimed up at the firewall, or aimed forward?"

Well, I have an extra right side head...I just need to work out the water cross over from the left rear to the right front...

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