So you're thinking of swapping a manual 4 cylinder fox to a 5.0, and keeping the tranny? If so the following will apply:
Yes it will work, but there's a lot more in that conversion than just the tranny. Youll need the 4 cylinder throwout bearing from a diesel ranger, the clutch pedal from a 5.0 car (4 cylinder won't work becasue the arms are too short to engage on the 5.0), new clutch cable and pressure plate, 5.0 flywheel, clutch and bell housing for a 79-93 5.0. Not to mention the 5.0 fuel system, wiring harness, brakes (both front and rear), 8.8 rear axle, 5.0 engine and motor mounts, drive shaft..etc...etc..
To be honest, in any case, You might be better off finding an AOD 5.0 and swapping that to manual. I did that, and I have no regrets.
Or just wait till the right car presents itself.
2000 Mustang GT-Former giggle gas addict
1990 Mustang GT w/ Vortech V3
***resident gun idiot***