My harmonic balancer went out last week on my '93 civic, and tore up
the end of my crankshaft rather wickedly. The car has 170,000 miles on
it. Nothing has been serviced outside of Honda's standard
replacements, and the aging motor generally just sounds worn and tired,
the head gasket has a small leak, and it seems like it's time to either
change the motor or get rid of the car.

A friend of my roommate has a 2001 civic, which he swapped the d17a2
motor out of sometime around 40,000 miles in order to make room for a
more powerful k20, and is offering it to me at a very reasonable price,
with the ecu.

Has anyone here ever done/heard of this kind of swap?

Is it possible? Is it stupid?

Mainly, if I have this swap done professionally, would the extra labor
required make it worth it to just buy a (much more expensive than the
d17, to me) new d15 and have that swapped in? How many extra man hours
am I looking at, roughly?