Trying work out the "differences" in all the various permutations of the tf 727 (IH code t-407) transmission which "might" has been matched to each engine offering is a real bitch. And I'm talking the internal guts...not the case differences between the ramblermotor shit and the IH motor shit. And doing this through the use of the IH parts lists for these trannys is near useless since IH was real fond of using the term "as required"...ya translate that as meaning "tear the sumbitch down, see what failed, and then fix it right", that can be further defined as...we don't know what's inside without looking!
Yes, the flex plates are dedicated to various engine designs, as is torque converter app.
The primary difference internally between a 196 unit and say a 304 or 345 unit will be the way the front clutch is assembled (how many springs and how many plates), the throttle pressure control lever "length" on the trans (above the shift lever), and the internal "calibration" (primarily the throttle pressure regulator setpoint), but most likely other parts as well.
But in my world, the 196 trans would be gutted out, rebuilt with the appropriate "hd" stuff and setup (attention to clutch springs and pack), and a transgo tf-2 kit installed which makes the unit bulletproof for any engine app.
My very basic analysis shows that the 196 trans was set up internally very similar/same to what would have been the same internals as used in a 225 six cylinder chrysler motor in a automobile that weighed a nominal 3000 lbs. Not hardly a "heavy duty" version!!
But then the "last gen" versions of the 196 727 became near identical to the sv versions. So who the fuck knows without a complete side-by-side teardown. And...I've never been into a 196/oem slushbox so I don't have any "notes" regarding the setup.
Does this mean it won't work??? Not hardly! But it won't be "best".
Be prepared for all kinds of surprises when doing what appear to be "simple" bolt-in swaps like this.
