Easy if it's original.
Look on the shifter read out.
If it has 3 speeds on it - D, S, L it's a 350 Turbohydromatic
If it has 2 speeds on it - D, L then it's a 2 speed tranny, (Tempestorque?)
Anyway, if it's a 2 speed, a TH350 should bolt in easy enough, other than the column shifter would need changed.
A TH400 could bolt in but the driveshaft would have to be shortened or changed to a TH400 one. Also, the crossmember will probably need changed, along with the column shifter.
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John Wallace - johnta1
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