Mr. Gasket Sure-Lock Rocker Arm Nuts - For Aluminum Rocker Arms - Fits SB Chevy 283-400 , Pontiac V-8 , Ford 289/302/351 (Except 351C) - Gold Tone Finished Nuts Have 3/8" Stud and .540" Shank O.D. Mobile Electronics Parts & Accessories found on mid-size GM Metric

found on mid-size GM Metric frames

They are also recommended for rock crawlers and off road driving

Bassett's 15 x 8 D-Hole style wheel for the IMCA

The diameter is 330mm and it features a deep 88mm dish

7 in x 10 in Base

Mr. Gasket Sure-Lock Rocker Arm Nuts - For Aluminum Rocker Arms - Fits SB Chevy 283-400 , Pontiac V-8 , Ford 289/302/351 (Except 351C) - Gold Tone Finished Nuts Have 3/8" Stud and .540" Shank O.D. Mobile Electronics Parts & Accessories found on mid-size GM MetricDesigned to keep the rocker arms positively locked for precise and critical valvetrain adjustments. Manufactured from quality grade steel, then heat treated for extra strength and plated with a durable finish. Kits include 16 rocker arm nuts with socket head set screws and one hex key wrench. Fits Chevrolet 283 400 SB, Pontiac V8 & Ford 289 302 351 (ex 351C). Gold tone finish. Vehicle Applications: 1971 1971 Mercury Monterey 1961 1974 Chevrolet K10