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#1
11-19-2008, 09:22 PM
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Exaust manifold swap
Hopefully I am in the correct forum. I have a newly rebuilt '66 389 4-barrell w/ a/c and power steering. I am putting it a 65 gto. I do not have the exaust manifolds that came with the 389. I do have a set from a 350ci '69 Tempest. They fit up to the 389 but only have 4 bolt holes per side. There are 6 per side on my 389 block. Will they work and not leak??
Thanks, michaelroy 
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#2
11-19-2008, 11:35 PM
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They'll fit the motor and should not leak, Pontiac used the 4 bolt style from 69 - 72. I am not sure if they will fit in the car, might have some clearance issues.
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#3
11-20-2008, 11:02 AM
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exaust man
Thanks Bob. That's good news as I have refurbished the manifolds and finding replacements seem like hard work.
mike |
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#4
11-20-2008, 03:11 PM
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for what its worth. im running 4 bolt manifolds with a turbo backing things up and its not leaking.
__________________
Vic in SoCal. Follow me on Instagram- Cloud9orbust 66 GTO clone, 467 cubic inches of Turbocharged Multiport Fuel Injected fury twisting a TH400 into 3.90's wrapped in a 12 bolt posi.  My T56 Install My Turbo Build My Vortech Supercharger Build Hyd Throw out bearing Misc Build Pics May the Karma Gods meet you half way.... |
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#5
11-20-2008, 04:06 PM
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Don't forget the steel shim gaskets.
__________________
 3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
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