I'm just wanting clarity of the product your speaking about, hence my suggestion for pics.
Also you never did answer my question regarding the starter that you replaced, if it was a old school direct drive or not.
Now onto the other piece of the puzzle you did not divulge in the original post, that you have a 13 tooth gear on the end.
I will go and dig out my 3 starters; two with nose cones and gear reduction style but different models and I'll also dig out my gear reduction PS starter with no nose cone and do some measurements on them with pictutorial info on all three, this will in the best way I can confirm or deny the information I've understood and seen and dealt with directly in regards to interchange.
While I do that I may ask a friend to check starter interchange as well between IDI years/trans and PS starters. I am not certain there will be time for this portion.
I'll count gear teeth on each starter, measure distance of engaugement and provide that data here.
If you are correct cool, however those NON nose cone starters are a weaker design by design from the lack of nose cone support for the dive. Also they are as previously mentioned designed for a PS which is considerably lower compression and do not require the same level of motors torque value to spin the PS vs the IDI
We are having some fun and perhaps it may seem like it's at your expense, and I want you to know it's NOT intended to be that way. Just the other day we saw a posting for a 92 IDI Powerstroke turbo on ebay and it was clearly an IDI not a powerstroke...we see this lots here where misrepresented info on ebay or other sites causes confusion.
Understand that to post something like you did without quantifying everything can lead someone else whom may not ask questions to go buy a PS starter and try to get it to work, without knowing that it may NOT, or may indeed work. Others read here and then go follow along not knowing can cause catastrophic failure of some part....not just starter but other things that are dealt with daily here. I'm sure you wouldnt want anyone to do something and having a problem because they thought it was right....
We are trying to draw the information out of your post and pictures help immensely.
If you where offended by my IDIstroke, I apologize I did not intend that what so ever.
Al
EDIT..
Also could you please edit your one post with the inappropriate F bomb in it, we are a family oriented site and perfer not to have the flotsam and jetsam of said phrases in the forum.
Thanks
Al