hey all i just got back from NC on vacation and purchased a new B20, i was told by my friend who owns the shop that if you put a STOCK B16 head, on a STOCK B20 bottom end that the valves WILL hit the pistons!!!!!!

i have never heard this before and am now concerned, is this true? i thought there was plenty of room for valves due to the low compression ratio?

any help is appreciated in advance