br1t1shguy on Jan/31/04 said:the b20 head is 100% identical to a b18b head. Thus they are the same.
Spotfacing and deshrouding the valves definetly is a good idea.So the combustion chamber bore is exactly the same on the b20 vs the b18 heads?
Yes, with the exception of the rare P8R head.
Quote: Just want to double check because I'm thinking about boring out my b18b block to 84mm and use my LS head, and I'm wondering if the LS head's combustion chamber bore would have to be bored out to match the block's new 84mm bore.