Greetings

I'm new to these forums, and to Honda in general. I've been into oldschool BMW's for the past one and a half decade. I've done a couple of engine swaps and know a thing or two about these engines and electronics now, but Honda is a complete different game for me. Recently I've been plating with the idea of buying a 5th gen Civic Coupe. I always loved those cars as a kid. Because I love engine swaps and performance upgrades, I was considering something like a K-swap. These are very popular in Civics. But there are a couple of things holding me back. Where I live, we have annual inspection of our cars, and if they even suspect that the engine is not the original one, it will not pass the inspection. The thing is: with BMW's I've swapped some cars from a 2.2 liter to a 3.0 liter engine. 6cil to 6cil, no one even noticed this, so no one even cared, it passed the inspection flawlessly. Some of these techs are even that dumb that they didn't even notice an M-engine in a non-M car, and a friend of mine swapped his 4cil diesel to a 6cil diesel, also made it past the inspection. Then there are others who have done a 6 to 6-cil swap, and failed inspection because the intake was "slightly" larger and the tech spotted it.

I want to decrease the risk of getting caught. The K-series has the exhaust at the rear and the intake at the front side of the engine. The opposite of what the "normal" civic engines have. Another factor is the cost of finding a K20A. They go for rediculous amounts, IF you manage to find one.

So I was thinking of maybe a B18C engine, an 1.8 liter from an Integra type-R. I do know there's a lot of support for K-swaps, but I can't find a lot about B18C, or maybe even H22 swaps. My questions, if you compare the K20, B18 or even the H22, what can you tell me about:

1. cost efficiency. Which would be cheaper?
2. difficulty to install? (not talking about actually dropping in the engine. More electronics and wiring-wise. BMW has an anti-theft system that if it suspects there's a non-stock ECU in the car, it won't start. How does this work with Honda?)
3. K20A's have 6-speeds, are there 6 speed options for the other swaps? This would be my daily and I don't like the engine screaming at highway speeds
4. performance wise --> Is the B18C somewhat capable of getting close to the K20A?
5. compatibility. Do I need other axles, can I maintain the A/C, how much custom work is needed?

Thank you in advance!