ok.. as most of you know, my black Si is down from an accident. so im looking to rebuild her, and putting on some nice mugen stuff. well i found a site where they are selling a mugen valve cover. they say it will only fit on a B-series engine. now i know my stock Si has a D16 in it, but i was thinking that when this engine ever goes up, i want to go to a ZC, which is DOHC NO VTEC (correct??). would this valve cover bolt onto a ZC or does it have to be a B-16?? i thought the only difference between the ZC and the B-16 is VTEC, im not sure, hence my question. Now, if i can't bolt the valve cover on, could i bolt a B-16 head onto the ZC block?? and do the valve cover that way?? im sure this really sounds complicated, but i hope it makes enough sense to someone thanks guys