I looked at that too Noyade, but I cannot find one of that series which does not have a cooling intake under the engine.
Hi LM. I suspect that you might be looking at the S-49A which has the intake below the engine?
Were you or are you a religious collector of your home grown Air International magazine? If so, check out the "Fighter A to Z" entries for February 1983 which shows the rear fuselage intake for the S-49C in a three-view which matches skytrain10's on page 99.
And being a lazy bastard, this next challenge appears on the same page.
