Ford Mustangs, Lincoln Mark's (7 or 8), and Mercury Capri's all have 5.0's starting in different years. As for the Mustang History, if going fuel injection and it sounds like you are, the best year would be 89-93 unless you can find a 88cali or one that already has a MAF conversion. It's really easy to tell, look at the air inlet tube with the filter going into the fender or with the open filter and see if it has a black unit on it with wires going back to the harness and intake. If it's just the tube/hose than it's speed density which isn't all that bad unless you plan on doing a lot of mods. If you find a good 86-88HO don't turn it down cause they're still hard to find, at least where I live. The speed density can be converted easily but there are other differences. Hmm where to start, 85 was the first true "HO" motor with the roller cam and 4V intake. 86 had flat top pistons(only year) and if you are redoing it go to notched forged or hypereutectic otherwise you may run into some problems. 86 was the first fuel injection year(speed density) and it also used crappy experimental heads that don't flow well. 87 they went to the "truck" style better flowing "E7TE" heads they used til 95. Forged pistons came in 87 I believe also. 88 some cali cars had MAF, 89-present all "HO"'s did. Umm, in 93 they went to hypereutectic pistons and a slightly smaller cam .. not a big problem but a 92 is better and probably didnt wear as much. And yes, a Lincoln is a great find. I believe only 87-89 used the 302HO though .. I got a 87HO from a lincoln mark 7 and am rebuilding it now. One good thing about finding a lincoln is you know some kid wasn't out hot rodding it putting in gears and revving it 6000RPM daily to show off, that's why so many fox bodies get trashed and are less likely to be rebuildable blocks if theyve already been bored 40 or threw a rod or something. I dont know much abot Capris but I know that a LOT of fox body aftermarket engine stuff says fits mustang/capri but I'm not sure what years are what.