Join Date: Oct 2014
Location: Nashville, Tennessee
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Green.....Geeteeohh guy is right!...I always say that....the Pontiacs do not have the three prongs, the end play of 020 to 060 will be great...
The GM speck is even broader, 010 to .100 as I recall. When they get up high they get sloppy. Had a friends 64 Corvette that would not let the idle stay put. It hunted from 800 to 1000 Rpmís. Pulled the distributor and checked the clearance up near .100. Shimmed it down to .015 and the idle became rock solid.
Use hardened steel shims amoroso sells them in a small pack, do not use just any washer.
The small indent that geeteeoooh guy mentioned is supposed to index with the tip of the rotor. Before I take the gear off I always put a white dot on that indent just as an extra check to make sure I donít forget it. It is black and barely noticeable, and have seen many put on wrong, as even the best of us can forget things when moving fast.
Shim it if the end play is too much.