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Old 02-06-2002, 02:44 PM
ODDA ODDA is offline
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Albert,

Lou is right! You can also use a TH400 from the early/mid 70's Gran Prix's. Biggest thing to remember is the 389/400/421/455 bellhousing bolt pattern is Pontiac only. Chevy won't fit without an adaptor plate. You didn't say what you use your Poncho for(or its gear ratios) so as to determine whether or not you need an overdrive. Randy's Ring & Pinion and Richmondgear both have great calculators to help you decide which way to go.
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