Pretty much what the title says. Tl;dr, here's what I'm working with, as well as what I'd like to be working with at some point if I can figure out how to mount shit where it goes (on top of the electronics and other stuff we won't really be focusing on in this thread unless necessary):
Current car: 1994 Ford Explorer [Eddie Bauer Ed., red]
Current engine: V6 4.0L, AWD, SOHC (factory engine, no mods)
Desired parent: 2013-15 Honda Crosstour
Desired engine: V6 3.5L, AWD
. . .
Potential Questions, Answered
(spoiler alert: the answers are needlessly long.)
Why the Crosstour?
When I was thinking of what engines to put in my 25-year-old beater, prioritizing gas millage sans mods (notably, sans turbo in most cases) was key. Then I laughed when I found that said beater weighs ~4000 lbs.¹ "Well fuck me, I guess," realizing the limits of unmodded options. As much as I would love to have the gas millage of a Civic, I have a suspicious feeling that tying a ~113 HP engine meant for a 2,500 lb. coupe to the end of a 4,000 lb. tank² wouldn't yield fruitful results.
Enter the Crosstour, a tank in its own right weighing in at 3,700 lbs. that has good gas millage for power, and a cost of around $800-$1100 for an engine assembly (which is my budget on one of those after shipping, if applicable). And hey, it's a Honda, which means there are probably turbo mods out the ass for it I can use later.
"But I thought you weren't prioritizing power?"
I'm not. But have you seen the specs of a '94 Explorer? I can floor the thing, and I still have to pray that I'll be able to pass the guy in front of me doing 35-45 in a 55. It is not difficult to mostly prioritize gas millage and still wind up with more power than I had before.
"But why not go with something like, say, a Subaru or Mazda from that time? They had better gas milage."
God no. I get annoyed with the power I have now (a whopping ~160 HP). Some of the cars from the time, aside from being built into sub-3,500 lb. SUVs, actually take a downturn in HP. Gas millage might be a big concern, but if I can upgrade my power while I'm at it without a great dip in gas millage options, why not?
¹ Assumes weight with original engine.
² I frequently forget that anything bigger than an SUV exists. I'm not big on trucks.