You probably mean grade 8 bolts. Typical SAE bolt grades are 2, 5, and 8. Anyhow, the recommended (generic) torque for 1/2" Grade 8 coarse thread bolts is 80 ft-lb, and for fine thread - 90 ft-lb. LINK So your guess was pretty good.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
