I know a couple built motor, turbo, automatic d series. They eat transmissions for breakfast. Which is the reason 99% of people don't use automatics in import cars. The transmissions really don't hold the power.

At least with a manual you've got a chance of your clutch going out before having your transmission break.

And the Auto H22 will not fit into the civic without a LOT of cutting and welding. The transmission on the H22 is HUGE. There just isnt enough clearance space in the civic front end.

So, if you're thinking of going H22 then you'll need to go manual. Unless you have the time and money to get a ton of custom fab work done to the engine bay/frame/suspension.

Different is not always better.