An I4 would cost more to do for sure. On that note, you've heard it from plenty of people in more than just this thread, there are lots you can do to the motor you already have in your car but you've obviously made up your mind so go get a cherry picker, rip out your 320 engine and throw a 230k in there. Then when your car has 0hp because it won't run, don't come on here and whine. That or you can trade it in so someone that will appreciate it for what it is can enjoy it and you can go get something else. After listening to that youtube clip, if you think that sounded good, I see a civic in your future. You'll find it's a much easier car to mod, it has a ginormous aftermarket and you can be like every other kid out there with 75 stickers and picnic table on the trunk.