I recently put a y8 head on my dpfi b2 block, I used the dpfi manifold for now till i swap my fully built b16 into my 99ex, then i'll go mpfi with the parts. hell i might even rebuild the bottom end (298xxx mi.) and putt the whole d16y8 in it. before i put the y8 head on she smoked a tiny bit till warm, when i took the head off i noticed the cylinder walls were glass smooth, after the head was on she smokes very badly. it gets worse when i advance the dizzy, but it runs better. all-in-all it runs great(really torqy). I did a compression test after swap 210, 215, 205, 230; the numbers look good but i've noticed a little bit of coolant seapage inbetween the head and the block (the head was good when i pulled it off my ex). i used the d15 head bolts, but i noticed one of them was too long so i had to use a bunch of washers. do i use the arp studs for the head or the block? also can i use any d series rings? i know the bore is the same, but what about the ring thickness?