Originally Posted by jazty
Perhaps I'm misreading this. Are you trying to say that the 7.3l can't have Jake brakes installed? That's probably true.
It can, however, have an exhaust brake installed. They actually come from the factory with an Exhaust Backpressure Valve (EBPV) just after the turbo. This is intended to warm the engine up faster in cold weather, but some folks have taken manual control over it so it can be used as an exhaust brake. It's not highly recommended, but it works.
Otherwise there are aftermarket exhaust brake kits.
Compression brakes? For sure not, too small of an engine to be worthwhile.
Exhaust brakes? Read here
Jacobs Vehicle Systems | FAQs
Like you said, the EBPV is used to warm a cold engine up from the factory. From the factory, it was never intended to be an exhaust brake. According to Jacobs and Ford/International, it's recommended not to have an exhaust brake on that engine, and they specifically state the consequences. IMO I'd trust their testing/judgment over any forum warrior or aftermarket company. If they would have felt comfortable doing it, I think they would have, because it's a helluva nice feature to have. But they didn't, so......