Please take a moment and update your account profile. If you have an updated account profile with basic information on why you are on Air Warriors it will help other people respond to your posts. How do you update your profile you ask?
Flew on P-3A BuNo 152169 back in early 70's. We had one P-3A older in the 150XXX range which we used as a project aircraft but my memory fails me on the BuNo.
An interesting website here with lots of detail, although I found some erroneous dates.
All the EP-3Es when I was in the squadron were 156s from '68/'69 or so, they had been pulled form the boneyard and converted.
I am pretty sure I have a 150XXX in my logbook, we had two VP-3As in VQ-1 until the late 90s, as well as a UP-3B that is now NASA's NP-3B test bird. IIRC PACFLT had a 149XXX VP-3A in the late 90s too, rougher/more worn looking cockpit than I expected for a VIP bird.