I know i have posted this before but i was talkin to a friends who did a b20 with a itr head custom pistons and such and he told me that when putting a b series vtec head on the b20 u have to do some extinsive porting and such to get the proper flow and combustion zones just wondering if anyone knew anything about this and how much the estimated cost would be to do it. JUst need info to find out if this is true.