Find a Country Squire from 1974. Install engine. Call it good. Do something more appropriate with the 140. Not too hard to stuff a turbocharged redblock in there.
-J
Disagree on the turbo redblock in a 140 being easier than 302/289 in the 140. Or "better" for that matter. Either will be an adaptation, with all the potential pitfalls and benefits either way. The turbo redblock almost always looks like a hackjob mess. Other than it saying "volvo" on it, or being able to bolt it to the M40/41 and explode it, it's basically every bit as much of an adaptation and doesn't fit all that well.
The swap nickle dimes you and is always a compromise and never really works all that well and you're stuck with a super weak ancient transmission (M40/41) that's going to shatter like glass behind a turbo SOHC motor or an M46 with horrible ratios, slant install that doesnt fit in the 71 and earlier cars same as the T5. Or cough up the grand and kludge all the compromise T5 adaptation bits in there (not including the trans itself) for the redblock, but that grand could have bought you the Mustang and Mountaineer parts car T5 included and then some if you're resourceful.
The 289/snub-nose 302 from the Exploder/Mountaineer looks like it belongs in there if re-combining the exploder/mustang/general ford junkpile and actually fits in the 140 engine bay better than the redblock in most ways, being narrow on the bottom, wide on the top, with the intake in the middle like a kind of pancake.
Cost of a parts car with a sweet 5.0 drivetrain already no big deal, T5 fits in the late tunnel which comes with the parts car with no funky/costly redblock clutch/transmission adaptations or anything, snub nose accessories and a wide radiator is all really.
Really, 289/302 and (Land)Rover/Buick V8 are about the most compact common/inexpensive production V8s if you have that bug.
They have their limitations to say the least (302 being basically a paper weight for much reliable/cheap power over 300hp (and certainly 400hp/forced induction), but for size/simplicity and a mild 250-300HP they'll cost about the same or less than the turbo redblock and fit/work as well or better than the turbo redblock in the 140. Weight comparable in stock form, a little lighter with aluminum heads and SS short headers.
The LSx can be trimmed down almost compact as a package, but if you don't *need* more than 250-300HP, cost will be a LOT more than combining the ford junkpile (since you can do the 289/302 all junkyard basically and it comes in Mountaineers up to 2001) and maybe even rover junkpile (not that I'd choose to) if you know a poor Brit throwing that **** out.
The Mustang 302 actually has about as much power as a 460.
460s benefit from the Banks headers a lot, but are super reliable as a torque truck motor.
Cracked manifolds on RVs that run wide open almost always and horrific fuel economy are about the only complaints.
Not really suitable for a small(er) car.
Measured once just out of interest/entertainment. Doesn't physically fit between the frame rails/steering box, exhaust ports basically right against the inner fenders.
NVM mounts, accessories, and/or manifolding.
If 800lbs on the nose, single digit MPG for the carbed variety, no hood and a tubed or swiss cheese front end to wind up with a car slower than a mildly warmed up 240Turbo or Mustang or new camry V6 just tickles you pink, doo et.
Maybe if it becomes a tube-frame car to get it in there and working right (a motor of that size probably goes in the middle at that point), or utterly butcher the car and get it in there at all
lol
, but at what point is it really a 140 anymore, or worthwhile to choose that particular old less than awesome carbed 460 lump?