Valve cover bolt for 1978 400 engine

[Fred A]

Hello, my 1978 v8 400 engine is missing a valve cover bolt. Anyone know the size of bolt that I would need? Thinking about going to hardware store to buy one?

 

[58Belvedere]

More than likely its a 1/4'' x 1/2 to 5/8'' long with coarse threads like 20TPI. Stick something in the hole to see how deep it is. 7/16'' long... Valve Cover Bolts 1/4-20, 40 in.lbs torque, 7/16 in. A shoulder head will spread the torque and keep from dimpling the VC.

 

[58Belvedere]

a whole set: Valve Cover Fasteners - 16 Piece Kit - 64-74 Dodge/Plymouth 383/440