68 l36 water neck housing bolt head markings? not reading a specific answer.

[Brandon T.]

Anyone familiar with what head marking they should be for sure?

thanks

[Rich P.]

Re: 68 l36 water neck housing bolt head markings? not reading a specific answer.

Brandon,

The 660 thermostat housing could have over a dozen known hradmarkings. Both long and short bolts were grade 5 just a few headmarkings are...A, M, TR, C, WB, RSC, RBW, M in a circle, F in a circle, P and on and on. I personaly have seen all of thse markings on 68-69's. So you could take your pick.

Rich