[SR-71]

Looked at a 27,000 mile original one owner Tri-Power 4 speed 66 that had a yellow spring on it.

[Tom Vaught]

Originally Posted by SR-71

Looked at a 27,000 mile original one owner Tri-Power 4 speed 66 that had a yellow spring on it.

I have seen 97% of the 66 Tri-Power cars (that I had looked at over the years (closely)),
with the Yellow Spring and THREE 66 Tri-Power GTOs with the Blue Spring, and as I posted in the beginning of this thread assumed the owner swapped springs at some point.

Tom V.

[Kenth]

I found in the 1967 MPC spring #9784823 for 1966 T/8 and 1967 T/8 exc, cruise control.

1963-65 T/8 uses spring #544922.

1967 T/8 w/cruise control uses spring #9789460.

In later MPC´s the 9784823 were superseded by 9789460.

If the 1967 T/8 exc, cruise control uses a blue spring so would 1966 GTO Tripower?
And if, is the 9789460 blue also?

[Sloan66]

I wonder if it varied by plant. I know that both mine and 60sstuff Fremont built cars came with the blue spring.

[DANTIP]

Originally Posted by Sloan66

I wonder if it varied by plant. I know that both mine and 60sstuff Fremont built cars came with the blue spring.

My original Fremont tri-power return spring in post #10 is most-likely original. May be a "plant-thing".

[Tom Vaught]

Originally Posted by DANTIP

My original Fremont tri-power return spring in post #10 is most-likely original. May be a "plant-thing".

I personally never say "never happened" as I have seen personally too many "differences" with 64-66 Tri-Power Carb vehicles over the years to question anything that plants did.

Just a thought that came to me:
If a spring vendor won a contract for a blue spring for one plant and the spring proved out to be acceptable on several applications besides Tri-Power cars, then the possibility exists that the Blue Spring would migrate to other plants in some fashion. Especially if the design could be used for other induction systems with say a "carb extension" change on a given carb.

Tom V.

[Kenth]

Wasn´t all engines assembled at the Pontiac plant and then shipped to car assembly plants?

http://www.musclecarfilms.com/images...mbly_photo.jpg

[Tom Vaught]

Originally Posted by Kenth

Wasn´t all engines assembled at the Pontiac plant and then shipped to car assembly plants?

http://www.musclecarfilms.com/images...mbly_photo.jpg

That is what I always assumed. Keith Seymore or Mike McCarty's Dad worked in the Pontiac Area in different plants. Keith might be able to lock that assumption in.

Tom V.

[66GTO Jim]

Originally Posted by Kenth

Wasn´t all engines assembled at the Pontiac plant and then shipped to car assembly plants?

http://www.musclecarfilms.com/images...mbly_photo.jpg

Yes. Plant 9, Pontiac, Michigan