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Old 05-08-2006, 10:08 PM
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TH 400 swap

i have a 1970 pontiac lemans and i am converting the tranny from a turbo 350 to a turbo 400, the TH400 appears to be a little longer, i was wondering if anyone knows what i need to change for this conversion, my main concern right now is the drive shaft... anyone know?
-char

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Old 05-09-2006, 05:02 AM
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Assuming your Le Mans is a coupe/sedan/ragtop (not a wagon) use a driveshaft from a 70 Gto or other t400 equiped Tempest. Pre 70 had different engine mounts and may require a different shaft, you'll also need to move the crossmember back, change the cooler lines and convert from cable to 12v kickdown. Try to find a 400/455 auto 70/72 tempest donor.
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Old 05-09-2006, 09:49 PM
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what to you mean convert to a 12v cable? i have a manual kickdown?
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Old 05-09-2006, 10:17 PM
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Turbo 400's use a electrical switch for a Kick down ...
Not a cable
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