Quote:
Originally Posted by 1972gmcsierragrande
Looking for a smog pump pulley number 3917234. Was used on 1969 Series 10-30 with 350 and smog and 1968 series 20-30 with 396 and no a/c. Will have the part number stamped in an arc on the pulley face.
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I have a smog pump that I just took off my 69, but it is a 250 six. I can look to see what the number is for you.