A model low compression 6.9 83 models had 315 ftlbs and 170hp
B model when they upped the compression it made 175 hp and 338FTLBS
The 7.3 from 88-91 made 180 hp and 345FTLBS
then the 92-94 NON TURBO engines made 185HP and 360 FTLBS
Finally the 93 and 94 turbo idi made 190HP and 388FTLBS
The 94 powerstroke makes 210HP and 425FTLBS
I personally own an engine from each era and my 83 model 6.9 has more power than the powerstoke i do have a 93 model idi turbo kit on it, but it will eat the powerstokr even when the powerstoke is running perfect and not missing like it does sometimes,
I can tell you there is not alot of difference between the engines and how the run power wise, and that with enough fuel and timing tweaks an 83 A model can out run a stock powerstoke cause mine out ran our psd with ease when mine was still non turbo, sounds likr the psd has the advertised horsepower right?