You're welcome. Yes, the turbo 400 was an option. You may want to consider having your driveshaft shortened (cheaper). It is not as scary as it sounds. Look in your yellow pages. Most machine shops do it. In fact, have it balanced and new U-joints put in it while you're at it and you will be done. Even though stock driveshafts were different between powerglides and the 400's, your drive shaft will be adequate for any application except an "extreme" motor.
Ps. Do not get a solid tranny mount! Get an original rubber one or you can go with the polyurethane/polygraphite mounts if you prefer.
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Rick
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