1959-1979 Pontiac / Oldsmobile. 326, 389, 400, 421, 428, 455 V8. Internal balance. 4 bolt pulley pattern on 3.300 bolt circle. Holes in pulley must be re-drilled, ’69-later timing cover & pulley may be required on early models.
Bore Diameter
1.3720″
Degree Marking Range
50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270
Degree Markings
Engraved
Engine Balance
Internal
Finish
Black Zinc
Keyway
Single; (3/16″)
Length
3.247″
Material
Steel
Mounting Hardware Included
No
Outside Diameter
6-5/8″
Pulley Bolt Pattern
4 bolt pattern on 3.300 circle. Holes in pulley must be re-drilled. 1969-later timing cover & pulley may be required on earlier models.
Safety Rating
SFI 18.1
Weight / Rotating Weight
10.2 lbs / 6.8 lbs
Shipped Australia-Wide
Dispatched from within Australia with tracking.
Same-day dispatch on in-stock orders placed before 11am AEST, Monday–Friday.
Shipping is calculated at checkout based on size, weight and your delivery address.
Estimated delivery 2–7 business days depending on your location.
PART # 650401 Fitment 1959-1979 Pontiac / Oldsmobile. 326, 389, 400, 421, 428, 455 V8. Internal balance. 4 bolt pulley pattern on 3.300 bolt circle. Holes in pulley must be re-drilled, ’69-later timing cover & pulley may be required on early models.
