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Just looking to see if anyone has a track heat 440 manifold they might be looking to sell soon before I buy a new one.
Located in San Diego but can cover shipping if the price is right.
No it was originally a 318 manual on the floor 3 speed RR. It was changed to a 440 manual 4 speed. I wish it was a factory 440. That would make it a rare 74 GTX.
...of going to a different diameter.
Or, take Matt's advice.
I believe I and others were under the impression your car is a factory 440 car.
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Just a comparison, the torsion bars on my B-body '79 300 heavy duty suspension have a diameter of 0.98"; and the same 43.6" length as your car...