tranny???

Err, don't think you're going to get one then, The only OEM T56 that will work behind a small block Ford is the "Viper" version. Yes, some T56's were in late model Cobras an more commonly Camaros/Firebirds/Corvettes but they are very different. These other T56's are not at all adaptable as far as I know. The aftermarket T56's for sale for use in older Fords are also all the "Viper" version. The cheapest version of the T56 would be a junkyard Camaro transmission. The last one of these I personally saw sold for $1200. And it didn't look all that great.