Car in question: '92 Laser, 6/4, Stock
I'd like to hear people's opinions about the 1G 6 bolt head versus the 1G 7 bolt head. I've read that the 7 bolt head is slightly better flowing and has better coolant passages, is that correct? I believe Nash is running a 7 bolt head on his car? What all needs to be altered for installation of the 7 bolt head? The reason I'm asking is because from what Jacek and I have come up with, my stem seals are shot due to the good compression (I don't remember the exact #'s) coupled with smoking at idle so therefore I'd like to have my head rebuilt this spring. The head rebuild is going to be nothing more than something comprable to the EngineTecs stage 1:
http://www.engintecs.com/html/dsm_heads.html
So, stick with the 6 bolt or search for a 7 bolt?
EDIT- After some searching, I see that I would need to drill out the head stud holes from 11mm to 13mm to accept the 12mm 6 bolt head studs if I chose a 7 bolt head.
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