As a CA user for 2+ yrs I'd like to vouch against it as a reliable/no hastle swap. These are old engines and the quality of the engines still being imported is only decreasing. When I took my CA apart around the 2 year mark the cylinders were found to be out of round and the entire rebuild would have cost over 2k. They are great little motors in my opinion, if you have the patience/money for a project whose perk isn't power or reliability per dollar but uniqueness.
That being said I also wouldn't advise a crate engine. I looked for one last year when I needed a new engine solution and they were just too expensive. If you have the money and just want a reliable 240, it can be a good route. But honestly which of us fit those two conditions? Either you don't have the money and then used engines can be a great solution, or you have the money and want a fast car.
What I did was found an engine on craigslist for $350, compression tested it before buying it (easy), bought it, refreshed it
-cleaned the hell out of it
-new front/rear main seals
-new oil pan gasket
-spark plugs/wires
-clutch
and installed it. All in all it cost me under $500 and will definitely hold me over until I build up the other KA I have in the garage. If the beater engine ends up running good when it comes time to put in the turbo engine, I'll have an extra engine in the garage that is definitely good in case of emergencies. It's a win - win.
Good luck.