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Hi Mike- Good to hear from you over here as well!
I had already looked at your informative write-up on the brickboard site, but it doesn't really discuss car year & model types of where to find which heads. Philip has indicated that the 531 never made it to the US, so I'll probably have to go with the 530, which are fairly plentiful. The only reason I was prefering the 531 was for the more centrally located plug. Do you think that would make any noticeable difference from a detonation prevention standpoint on a 11:1 motor?
Brad
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