Re build your engine. New rings and bearing. Upgraded head gasket and ARP head studs. Measure your cylinders for taper and bore. Straight edge you block deck and head. Its also a good idea to measure your crank journals for taper and correct size, measure you crank boss bore and straight edge. 3 angle valve job, valve guides if needed and a gasket set. If you do not have the tool to do it yourself machine shops are not to expensive. With out this nitrous will more than likely crack you rings,blow a head gasket, melt a piston and or spark plugs if not tuned properly, spin bearing (all are bad news). If tuned rite nitrous is safe on a good semi new motor (as long as you do not go over board).

I would just try and find a new f23 and do this http://www.honda-tech.com/zerothread?id=1046336. This looks cool its a cheap h22 knock off.

Some book I have read and liked.
http://www.speednation.com/store/product1870.html http://www.bentleypublishers.com/gal...galleryId=1332
http://www.themotorbookstore.com/engine1.html
this should help you get started molest of these book are on the shelf of your local book store. Hell even wal-mart
http://www.walmart.com/catalog/produ...00000001827190