r/s ratio ?

I'm currently driving a 92 gsr. its coming up on a 180k. I love my b17a and 2nd gen integra. I wanted to buy a new b18a block and use my b17 head and build an ls\vtec. In doing my research Ive come across claims that the rod stroke ratio of the b18a/b pretty much suck. I realize that using stock internals is not an option. I was wondering what would be the result of using my b17 crank with the b18 block and rods? I calculated the r/s ratio to be 1.68:1. how would this affect displacement?any help would be appreciated. Also I wanted to transplant my vtec oil jets from my b17 block to the b18. does anyone have any info on this? is machining work involved?thanks....