71 BB Head Bolt Marking?

[Sheldon S.]

Can someone tell me what type of marking is on the headbolt for a 71 BB 454. I have looked in the JG and can't find it anywhere and none of my other books tell me neither.
Thanks in advance
Sheldon

[Joe L.]

Re: 71 BB Head Bolt Marking?

Sheldon-----

All big blocks originally used indented hex head bolts with a "cross" (+) headmarking. On original bolts, the "cross" extends all the way to the perimeter; later SERVICE bolts have a smaller "cross" with a significant "gap" between the ends of the "cross" and the perimeter of the bolt.

There is usually a very small manufacturer's ID mark in one corner of the cross. Several different manufacturers were used.