For the 65, 66, & 67 small block
On UPC N40, Sheet A2
The original forward engine mount screw p/n 3748038 is removed and replaced with /n 3786494
for the 63 & 64 the original screw was re-used
Since the part number changed, what was the change in the screw?
Different length, how much longer
grade? from grade 3 to 5 or 8?
Does anyone have the details of the two screws?
On UPC N40, Sheet A2
The original forward engine mount screw p/n 3748038 is removed and replaced with /n 3786494
for the 63 & 64 the original screw was re-used
Since the part number changed, what was the change in the screw?
Different length, how much longer
grade? from grade 3 to 5 or 8?
Does anyone have the details of the two screws?
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