i just finished installing a 77 440/727 out of a 33ft titan mh in my 70 satellite. all the i had to do for the engine was change the motor mounts, oil pan and manifolds. for the trans i swapped output shaft and the tail housing. got the right driveshaft from Tony's .
i have been driving it the last few days and have had no issues. i didnt build it though it was very clean and only had 50K on it.