Yes, it will bolt up to your block... As for the clutch and flywheel, you need everything for the tranny... Reason is the trannies have different numbers of trannies (21 in 88s and 89+ 20 splines or something of that matter, I forget the exact number)... So whatever year/model the tranny is, buy for that... Being a D15B2 its probably an LX... But you need to find out what year LX...

Second, I WOULD NOT bother boosting that engine... It has 8 valves, 70HP, and wont make much power even with a turbo... And it will probably not last very long... And for the cost to boost it, u could just buy a better engine... And the probably wont have much money left to replace it when it does blow up... I say swap it out for atleast a D16A6 if you plan to boost... Even the B2 would be a decent upgrade, but still probably woulnt make much boosted...

As for the harness, I doubt it... The layout of the interior of the CRX is pretty different than the Civic (no back seats for one)... And the different years are also different, so the chances all your sensors and switches will line up are slim... And there really would be no benefit from doing it anyways...