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I can only offer you my own experience.
I have an Elgin 964 grind in my 3.2L and am extremely happy. However, in order to take advantage of what those cams offer, I swapped out valve springs, retainers and rod bolts with more robust units. I am also running a custom chip because I upgraded to headers.
I actually bought a set of used 964 cams and when i got them there was some slight pitting. I was strongly advised to regrind them so they were fresh. It cost me an additional $700 on top of the price of the cams. I was not very happy but here we are. I am very happy w/my build.
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Mat P
1988 911 Carrera
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