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#1
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1968 GTO RA manifolds (pictures?)
I am trying to positively ID a set of manifolds that I have here as repops vs originals.
I believe that this is a matched set from a 1968 GTO (hence the location of the post). I was wondering if anyone has pictures of the casting numbers of these; I understand that the drivers side 9791637 is a 1968/1969 casting number, while the passenger side 9777642 is a 1967/1968 casting number (often mistakenly assumed to be a '641 casting number - but that's the part number of the assembly with the HRV). The passenger side manifold has the HRV plugged and removed. Thanks in advance for considering helping me with this little task
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#2
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Here are a couple of pictures of an NOS set of 68 Ram Air I manifolds.
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68 GTO Ram Air I Auto, Starlight Black/Teal-Survivor 68 Firebird Ram Air II 4spd, Aegena Blue/Black/Black 68 Firebird 400 Conv. Auto, Red/Parchment/Parchment 69 Firebird Ram Air IV, 4spd Matador Red/Black-Survivor 71 GTO 455HO 4spd, Lucerne Blue/Black/Black 71 GTO 455HO Auto, Lucerne Blue/Sandalwood/Blue |
The Following 2 Users Say Thank You to 1oldgoat For This Useful Post: | ||
#3
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Thank you very much.
I was trying to establish if what I have here are originals versus reproductions of some sort; I had guessed that the drivers side was OEM - but the absence of a casting date had me wondering; I had also guessed based on the provisions for the heat riser valve that the passenger one was OEM, but between the oversized casting number, a non-conventional casting number suffix, and the absence of a date code, I was wondering... Your drivers side one looks like a dead ringer for mine, but my passenger side one has the casting number in a different size and location than yours... Would anyone care to chime in?
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#4
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I'm sure yours are originals as they have never made a reproduction that was machined for heat-riser valve. The difference in size and location is likely due to different batch runs. I have numerous cylinder heads with different fonts, sizes and locations of casting numbers for the same heads. I have 1968 model 31's with two totally different size and locations of the numbers. One has both the 3 and 1 on the same exhaust runner and the other set has the traditional layout with the 3 on one runner and the 1 on the other. Just my opinion.
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68 GTO Ram Air I Auto, Starlight Black/Teal-Survivor 68 Firebird Ram Air II 4spd, Aegena Blue/Black/Black 68 Firebird 400 Conv. Auto, Red/Parchment/Parchment 69 Firebird Ram Air IV, 4spd Matador Red/Black-Survivor 71 GTO 455HO 4spd, Lucerne Blue/Black/Black 71 GTO 455HO Auto, Lucerne Blue/Sandalwood/Blue |
The Following User Says Thank You to 1oldgoat For This Useful Post: | ||
#5
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Thank you VERY much for your help in this matter.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#6
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Happy to help.
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68 GTO Ram Air I Auto, Starlight Black/Teal-Survivor 68 Firebird Ram Air II 4spd, Aegena Blue/Black/Black 68 Firebird 400 Conv. Auto, Red/Parchment/Parchment 69 Firebird Ram Air IV, 4spd Matador Red/Black-Survivor 71 GTO 455HO 4spd, Lucerne Blue/Black/Black 71 GTO 455HO Auto, Lucerne Blue/Sandalwood/Blue |
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