got pic's of my engine bay,What is it?

Thought I would post a new thread since the first one is a month old.Any way here are some pic's and question's.

What motor is it?
Is it a good motor?
And is it worth improving upon?
http://www.cherokeeforum.com/picture.php?albumid=514&pictureid=3357

http://www.cherokeeforum.com/picture.php?albumid=514&pictureid=3355

Its a B16A1 150-160hp. OK engine

Good motor for a crx, or civic hatch, looks a little beat up, I alwayz do a full tune up on any vehicle I buy second hand, just in case. I also run lucas in the oil and tranny.