[66lt1]

Is there a tri power expert in the house?
I just purchased a tri power setup which was supposed to be off a 66 GTO. After getting a good look at this setup, it was clear it is an earlier setup. It has no tags on the carbs,no casting # on the manifold other than what I assume is the date "c 5 9".
all 3 carbs have 1 7/16" throttle bores, and 2 5/8" air cleaner necks. All appear to be original. The casting #'s on the bottom of bowls are 7009094 with a 57 for the fr. and rear carbs. the center carb has a 700 and in a circular fashion7012139 along with the same 57 markings. a 2023 is cast in ea, of the carb. base. 529220 is cast in the t/stat hsg. Is this a sought after setup? Any info would be helpful, as I find the mid fifty Pontiac material hard to find around these parts.The heat crossover has round ports.
what years will this manifold fit?

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[This message has been edited by 66lt1 (edited 06-24-2000).]

[66lt1]

Is there a tri power expert in the house?
I just purchased a tri power setup which was supposed to be off a 66 GTO. After getting a good look at this setup, it was clear it is an earlier setup. It has no tags on the carbs,no casting # on the manifold other than what I assume is the date "c 5 9".
all 3 carbs have 1 7/16" throttle bores, and 2 5/8" air cleaner necks. All appear to be original. The casting #'s on the bottom of bowls are 7009094 with a 57 for the fr. and rear carbs. the center carb has a 700 and in a circular fashion7012139 along with the same 57 markings. a 2023 is cast in ea, of the carb. base. 529220 is cast in the t/stat hsg. Is this a sought after setup? Any info would be helpful, as I find the mid fifty Pontiac material hard to find around these parts.The heat crossover has round ports.
what years will this manifold fit?

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[This message has been edited by 66lt1 (edited 06-24-2000).]

[Blackcat]

If the carbs have the same throtle blade size
All three. You might have a 59-60 intake.
The J-2 Olds is commonly mistaken for a pontiac of early vintage.

[Ken K]

Does the manifold have a arm cast into it to mount accessaries, and does it have an X cast into the manifold? if so than it is proably a 57 or 58 manifold. Cadilac also had a tri power set up. I am not shure what year the end carbs went to a big bore but I think it may be 59 or in the early 60s. I have also seen different shapes in the holes for the coolant cross-over, some also have different shape water necks on them. Count the bolt holes where the intake bolts to the heads, if there are 10 bolt holes then it's a 65 or 66, if it has 12 bolt holes than it's a 64 or before. The early big bore end carbs can be used on a 65 or 66 manifold. Each of the end carbs is worth more than the manifold itself, end carbs are a lot harder to find than the manifolds.

[66lt1]

After further research aty local library, I am certain this is a Pontiac setup. It does have same size throttle plates at all 3 carbs. It also has an accessory mount on the rt. side front. It has no boss for the timingcover/waterpump stud. The only casting marks on the manifold are the firing order(18436572), and what I assumed to be the date code of "c59",which in later years would indicate March 5, 1959. From the limited info avail. to me, these carbs are for 57 or 58 years. The manifold has no X casting. Ken, I believe you are right in stating the larger end carbs started in 59.If this is a 57 or 58 setup, is there much desire for it? And is one more desirable than the other? Will this setup bolt on to any 57-64 engine? Thanks

[Blackcat]

The setup will not work from 61-64 the heads
were redesigned. I believe that 59-60 had another design change. 57-58 should be the same. The best bet is to find another person with a 57, another with a 58, ect and compare the intakes. It sounds like a pain.
But you will be sure what it is. Pictures would be very helpfull. Check with POCI And their TECH People.

[Chuck Jones]

Quote: Originally posted by Blackcat.

The J-2 olds is commonly mistaken for a pontiac of early vintage.

You can avoid this mistake by looking at the firing order . The olds up 64 fired 18736542, while the pontiac fired 18436572.

[carbking]

Waterneck casting number is 1958.

1957 waterneck goes straight up and to the front.

1958 waterneck goes straight up and then makes a large angle to the drivers side of car.

Pontiac manifolds have waternecks which bolt on the the front of the manifold in a vertical plane.

The Oldsmobile J-2 manifold has a waterneck which bolts to the manifold on the top front at about a 30 degree angle from the horizontal plane.

Cadillac 3x2 manifold has no water neck.

Chevrolet 348 3x2 manifold waterneck bolts to the top front of the manifold in a horizontal plane.

Jon.

Good carburetion is fuelish hot air.