Quote:
Originally Posted by Stan Weiss
If under square was the way to go why did Pontiac use the Olds 403 - 4.351" x 3.385"?
Stan
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Stan, you are making this too easy. It was already EPA and CARB certified for CA and high altitude areas. The Pontiac 350 and 400 were NOT. Look at the cam specs, carb jetting and ignition timing of the 403s. Then, consider the 403 had an air pump, catalytic convertor and was designed to burn unleaded fuel.