confused on e99 differences

[powersmk]

picked up a 99 f250 few weeks ago and now looking to do some mods to it. this my first 7.3. ive had 6.0s and a 6.4 but not familiar with the 7.3. after searching thru old posts I still don't know if I have an early or late 99. one post says one thing, next post will say opposite. my door sticker build date is 1/99 . read posts that say e99 have 4 bolts on compressor housing I have 5 on mine. already did lift and axle d60 swap and I believe e99 were supposed to have flat square u bolts on the front , I had later semi round like my other old 03 6.0 i had. is 5/99 and later build dates considered the 99.5?

 

[co04cobra]

Build date of 12/98 is the cut off. You have a late 99.

 

[powersmk]

thanks for clearing that up. was lookin at bd diesel and they were showin turbos that only fit 3/99 and later so that threw me off as well