ok i have a b18a1 block and i want to built it. ok i saw online that b20s have an 85mm bore its that correct? not the b16a has an 84mm bore now would i be able to have my block bored and run the b16 pistons? i was told that i can use a b16 crank for a stroker kit. is that true?

 

b16 have an 81mm bore like the b18s and no puting an b16 crank in a b18 does not make a stroker that would destroke it

 

ok do you know what the b20 stock bore is?

 

84mm

http://en.wikipedia.org/wiki/Honda_B_engine#B20B