No. 88-91 have a different body style than 84-87
no
The 1988 Honda CRX was a new generation of the model. The exhaust from a 1988 will not fit on a 1987 model.
With some modifications, yes.
45L..
No
9004 Headlight Bulbs
Yes.
I've stumbled across it somewhere online to be about 32 to 36 mpg.
they dont come with power steering *answered by darkmega :)
I would think any from 87-92 should fit.
If I understand the question correctly, you're wondering what cars the '87 Integra engine will fit in. The only car I know for a fact that it will fit with modifications to wiring and ECU would be the Honda CRX, I'm unsure of the years but it shouldn't be too hard to find. If you're wondering what engines will fit in the '87 Integra, there aren't many alternatives. There's the '88-'89 Integra engines, those have an extra 5 horses over the '86-'87 engines but you will have to redo wiring and get a new ECU. A better choice would be the JDM Browntop Integra ZC. A direct swap with no modification required and has around 30 more horses than the stock engine.