Quote:
Originally Posted by 1968firebird455
I am interested! Please PM me a price and shipping to North Royalton, OH
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Are you interested in the casting # that you posted or a true 403 crank?
390275 403 '77 - '79 Balance hole in the 1st throw, nice 1/8" or so
groove cut into the circumference groove on the #1
counterweight. Most drilled for manual trans use.
556607 350 '77 Plain iron. No 'N' on front weight. No balance hole.
"C" notch 5/8" deep, 1" wide.
556607 307 '85 This might be wrong. '77 350 is positive.