Milt,
The '70 - '71 models were the first engines to use the 'pull-type' clutch pressure plate and 'flat' flywheel, ... not compatible with the '64 thru '69 transaxles. Your engine would have to have a 'cup-type' flywheel to utilize earlier the '64 transaxle, so you already may be setup to use the '66 - '67 transaxle.
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Warren Hall, Jr.
1973 911S Targa ... 'Annie'
1968 340S Barracuda ... 'Rolling Thunder'
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