F150 intake won't fit, Expo PCM won't play nice without the 4R70W auto behind it till you go the custom tune route. Makes a 'stang SBF 302 very attractive but the wiring and FEAD become fit issues.
A custom tune on a mostly Expo swap is probably the best option, but even then, a working clutch has its own challenges.
A 'stang doner might be the less expensive path and honestly, the forged internals are a great way to go but the POS heads Ford used on most of them will have you wanting Expo heads or after market heads so any savings might vanish.
Lots of options, no perfect solution.