Truck starter question

it seems to be hitting on the dust cover maybe? the starters are almost exactly the same from what i can tell (truck has larger opening, gears slightly more visible, mounting block difference.) i will try to post a pic for reference later.
appreciate your thoughts and insight gents
thanks, Jay

Starters stock on left truck starter on right. body of the starter is smaller for the truck one.

from the side. notice how the gears are farther forward on the truck starter. idk if this matters?

heres what were working with

stock starter held in

from the bottom. holes line up and it is easily mounted.

truck starter in, had to remove o2 to position it in

from the top truck starter. only can get top side (original long mounting block) lined up.
thoughts? is this the wrong starter? i assumed all 5.3 truck starters would work.
do the farther forward gears of the truck starter have a play in this or maybe the small lip you can see right above the lower long mounting block catching on the dust cover? appreciate your help before i just stick the f'in stocker back in.
Other thoughts folks? Are there different p/ns for the truck starter? Am i missing something obvious?
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Heres what I am talking about with the lips. it doesnt appear that the regular one has these lips which may be catching on the dust cover? anyone post a pic of there starter mounted I would appreciate it. in the truck starter thread there are none that i could find.
also any thoughts on the farther forward gears catching? i wouldnt think this would be an issue
thanks

Heres what I am talking about with the lips. it doesnt appear that the regular one has these lips which may be catching on the dust cover? anyone post a pic of there starter mounted I would appreciate it. in the truck starter thread there are none that i could find.
also any thoughts on the farther forward gears catching? i wouldnt think this would be an issue
thanks
I had a busted solenoid on my original starter. Cant get it at the parts store but I found a place the rebuilds starters and they sold me one for 50 bucks. Alot cheaper than buying the whole thing. So I have my original starter as a spare, or for sale.
You trimmed the dust cover then put it on the starter before you mounted the starter? Or put on the cover after mounting the starter?








