As bloodclot was talking about the 737-200 with P&W JT8 engines and we're talking about the 707 which had those JT8 ones too (later and in another conversion), I found nothing wrong in his statement.

737-200 picture
http://en.wikipedia.org/wiki/File:Shaheen_Air_International_Boeing_737-200_.jpg
Looks familiar

But as I said, we have to face the fact that we cannot go "like in the rw" here concerning EPR values.

Lou, again, interesting reading.  :)