Ok ive done a bunch of research on this and im pretty sure my answer is yes i just want confirmation from someone who knows as i cant seem to find a clear answer. Just got my hands on a 90 prelude si in really good condition and im thinking about building a sleeper out of it. From what ive read the b20a5 motor in the lude wont bolt up to anything b series out of the civic/teggys for either the head or tranny without some rediculous machine work. Ive read that the newer b20b/z out of the crvs will bolt up to any head/tranny out of the b18/16 so im wanting to do that but my question is will the newer b20b/z bolt right up to my chassis without any modifications? also would i need to change the rod to stroke ratio to get it to rev higher safely (it will be built correctly of course, pistons/rods/block reinforcement/overbore) but im wanting to drop a higher lift cam as im planning on turbo and most cams i look at for the b18s loose power at around 8500-9000 but i want my block to be able to rev safely without having to worry about spinning bearings or worse throwing a rod. I would be interested in other options if anyone has any (although i do want vtec thats the whole point in a honda imo) my problem is im doing this at home, i dont have a good welder and hasport makes no mount swaps for my chassis design. Any help is appreciated, just keep in mind the simpler the better.