The above should be corrected to roller lifters, not roller rockers for the HO. (there were a VERY few engines built with roller rockers, an '85 T-bird is not one of them.
The '85 T-bird will more then likely be automatic. It will not have an HO motor with an automatic. The auto/HO combo never existed until '86. So that engine will be a standard 5.0/302. Nothing special. Will still have the newer 50 oz-in imbalance which can cause problems when not properly adapted with early 28 oz-in flywheels and balancers. You mention EFI, well that throttle body EFI is about worthless. On a completely stock engine it will run like a completely stock early 80's smog motor. It does not accept performance upgrades. You will be stuck as a lumbering 140 HP. If that is all you want, then it will work. But it will never be anything more.
Now if it is a stick, and a factory 4-barrel carb. That would be the same as the '85 stang GT HO. I don't think this was offered, won't go into detail.
Side note, all production '85 and newer 5.0/302 blocks should be cast and machined to accept a roller cam. That engine won't have one, but the parts should fit it. But with how Ford rolled over old parts inventory back then that is not a sure bet either. Using up the old stockpile of engines...
So it is a nothing special 5.0 that needs rebuild. That doesn't really have much value. But for free not bad. What an engine like this is good for is picking little parts when you get a better engine. Need a thermostat bracket, distributor hold down clip, cam retaining plate or some other little part that is a pain to find on it's own. If you got room to store it, it is a great thing to keep around.
