Measurement Specification

Engines may be encountered with oversize tappets (all eight) and/or an oversized camshaft. Oversize tappets will be identified by a stamping .254 OT'' on the machined pad below the rocker arm rail and above the No.1 exhaust port. Oversize camshaft will be identified by a stamping .38O/C'' on the cover rail above the No. 4 exhaust port and by stamping .38 O/S'' on the distributor drive end of the camshaft.

Camshaft Journal Diameter	- Note: Standard: No. 1, 1.761-1.762 inches; No. 2, 1.771-1.772inches; No. 3,1.781-1.782 inches; No. 4, 1.791-1.792 inches; No. 5, 1.801-1.802inches. Oversize: No. 1, 1.7763-1.7773 inches; No. 2, 1.7861-1.7871inches; No. 3, 1.791-1.7969 inches; No. 4, 1.7972-1.8068 inches; No. 5,1.8156-1.8166 inches.
Camshaft Bearing Inside Diameter	- Note: Standard bore diameter: No. 1, 1.761 inches; No. 2, 1.773-1.774inches; No. 3, 1.783-1.784 inches; No. 4, 1.793-1.794 inches; No. 5,1.802-1.803 inches.
Camshaft Bearing Clearance	.0009-.0027 Inch (in)
Camshaft End Play	0.0078 Inch (in)