Join Date: May 2001
Location: Chattanooga, TN, USA
You know, I just looked up the casting number on your original post. According to Chevy By the Numbers, 3932386 is a four bolt, only, and, if it's a Norwood car, could only be a 350/300hp (standard SS engine) or a (302/290 Z/28 engine) If you can look at the crankshaft flange, the 350 is sort of square. A picture would help, but it look at it like a clock. Horizontally, between 11 and 1, its straight. same thing between 5 and 7. 7 to 11 is radiused. 1 to 2 has a notch, same thing 4 to 5.
302 is easier to describe, round with a notch between 1 and 2.
Hope you have a 302!