If you do a search you'll find that this topic has been covered many times. The Civic and Integra forums will both have a lot of info on it as well as the Engine Tech forum. Here's some basic info to get you started.

Engine codes - all of these are "B-series" motors and are generally interchangeable.

B16A - 1.6 liter DOHC VTEC, 160 hp, del Sol VTEC, '99-'00 Civic Si
B16B - 1.6 liter DOHC VTEC, 185 hp, Civic Type-R
B17A - 1.7 liter DOHC VTEC, 160 hp, '92-'93 Integra GS-R
B18A - 1.8 liter DOHC, 130-140 hp, '90-'93 Integra RS/LS/GS/SE
B18B - 1.8 liter DOHC, 140-142 hp, '94-'01 Integra RS/LS/GS/SE
B18C1 - 1.8 liter DOHC VTEC, 170 hp, '94-'01 Integra GS-R
B18C5 - 1.8 liter DOHC VTEC, 195-200 hp, '97-'01 Integra Type-R
B20B - 2.0 liter DOHC, 126 hp, '97-'98 CR-V
B20Z - 2.0 liter DOHC, 140 hp, '99-'01 CR-V

The part number for the head of the B16A, B16B, B17A and B18C5 is all the same - PR3. The Type-R versions have more aggressive cams, a nicer intake manifold, and a mild port-n-polish job.

The B18C1 head is not shared with any other engine.

The B18A, B18B, B20B and B20Z heads are all similar, stuff like cams are interchangeable.

You can put a VTEC head on a non-VTEC motor but the oil passages will not line up with the block. You must run an external oil line from the pump to the head since VTEC is activated using oil pressure.

Generally a B18A or B18B block with a VTEC head is called an LSVTEC, and a B20B or B20Z block with a VTEC head is called a CRVTEC.

Unless skunk2 makes turbo-specific cams I wouldn't reccomend getting them.