I have a 1991 Civic DX hatchback. It has the original engine and I believe
it's a D15A.

It's time for an engine swap and I need to know if a D15B will fit in my car
or which other Honda engines will fit.

I'm not interested in horsepower. This is my commuter car and I just need
something relatively inexpensive and reliable.

Thanks in advance. Any help will be greatly appreciated!