Engine swap options -- HELP please -- Which engines drop in?

STICKMAN

Greetings-
My wife drives a '91 Civic Wagon, 2WD, 5-spd stick, 75k miles. Best little work horse we've ever owned. Engine is tired... burning oil. May be rings, may be valve guides. Whatever it is, I'm sure it would be cheaper to buy a low-miles, later vintage Civic engine of some sort than to rebuild her's.
So, my question is, which Civic engines will drop into her wagon with no (or little) modifications required? Would prefer to keep her transaxle, but not sure other engines will mate to it. :?
Not looking for extra power (VTEC etc), but I would consider a higher perf engine if one comes along, as long as it doesn't require fabrication/mods to slip it in.
Any advice / direction greatly appreciated!
Thanks-

sic944t

well .... since that motor is a dual point you are kinda screwed on super easy drop in stuff .... you motor is not a 4 injector motor so wiring needs to be done to make stuff work the other option and this one kinda sucks is maybe back date another motor to your fuel injection ..... if this was an SI model hatch or crx or the 4WD wagon then you could put in a couple motors without any real hassle ....
but then again im in the process of taking an auto wagon and putting in a stick with a B18 these swaps are not to hard but as you sit the options of drop in motors is poor .....

SiWagon

Does it need to be smog legal?
What's the budget?

STICKMAN

Yup, prefer smog legal, but that's never checked in our area so...
Budget... that's a grey area. I'm only looking at the swap options as an alternative to a rebuild. If a rebuild is cheaper, that's likely what we'd do. Thought I'd throw the question out there because if a later model Civic engine will drop in easily and there are piles of them "out there" that may be the simplest solution.
Open to all comments... thanks-

SiWagon

ZC engines are a popular swap,but I wonder how peeps got it pass smog in Calif.
'92-'95 Civic Si D16Z6 is another easy swap.
The above 2 swaps can keep the OEM wgn .tranny.
B16A is another popular swap.I don't know much about this swap.I'm sure 1 of the others will tell u more.
Make sure you budget everything.One gets nickel & dimed quickly especially with upgrades & replacing worn parts.Even a $400 ZC swap can swell up to a $1,000-$2K project.
This brings up one of 1 of the most interesting swap.A '02 Civic Si or Base RSX 160 hp K20A3 swap.Around $3,000.Probably no worn parts replacement 'cuz it's still fairly new.A lot of the above engines are 10-20 years old.Great 2 litre torque.Nobody wants these engines ;cuz they're swapping in Type S (or R) or 2.4 litre TSX engines.This is the future of Honda engines.