g60 head

A&Q about 350Z
Q:

Are the valve sizes in the 1H and PG engines the same as the PB. If so what is the difference in these heads
A:

rallye head takes bigger head bolts
A:

How did I Know you would be the one to answer this? So is the 1H head different to the PG head and what about the valve sizes, really appreciate your help on this, thanks
A:

all i know is the bolt holes are bigger...id suspect the rest it all the same
ask on they will probably know more
A:

PG is 1781cc
1H is 1763cc (rallye)
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