904 or 727 in 66 barracuda
This is some general info. Others with more internal torqueflite knowledge may offer more details.
* Late '70's or early 80's started getting lock-up converters. Input shaft splines are different so converters do not interchange.
They can be converted to take the more common converters by changing several parts, including the valve body. Lock-up transmissions have a smooth, machined tip.
* Very early 904's also have different spline input shafts and their converter has a small snout to fit early 273 crankshafts. These also do not interchange with later generations. They went to the bigger snout around '66, I believe. Someone makes a ring adapter to make the small snout fit into the bigger register on later, more common small block cranks.
* There are several "duty" levels of the 904. The best is a 999, which was found in '74 360-4 engines & some other later applications. But any "regular" V-8 904 transmissions would be suitable for your application, especially when performance oriented parts are used - i.e.: bands, clutches, valve body or shift kit, etc.
This is some general info. Others with more internal torqueflite knowledge may offer more details.
* Late '70's or early 80's started getting lock-up converters. Input shaft splines are different so converters do not interchange.
They can be converted to take the more common converters by changing several parts, including the valve body. Lock-up transmissions have a smooth, machined tip.
* Very early 904's also have different spline input shafts and their converter has a small snout to fit early 273 crankshafts. These also do not interchange with later generations. They went to the bigger snout around '66, I believe. Someone makes a ring adapter to make the small snout fit into the bigger register on later, more common small block cranks.
* There are several "duty" levels of the 904. The best is a 999, which was found in '74 360-4 engines & some other later applications. But any "regular" V-8 904 transmissions would be suitable for your application, especially when performance oriented parts are used - i.e.: bands, clutches, valve body or shift kit, etc.
