Exhaust Manifold Bolt Length

[Brian]

Anyone have an original 65 GS 401 exhaust manifold-to-cylinder head bolt (that is not installed)?  Need to know the correct length.  Mine were rusty junk when I got my car, so I put some off-the-shelf bolts in it when I put the car together.  Trying to find some of the correct appearing black zinc bolts now and want to get the correct length. 

[gs spoken here]

I did the same thing and know want to get more OE bolt and put the French locks back on. Bolt I have are slightly over 1" one with lock washer is later 66 GS. I was told the early 66 GS used the same as 65 with the French locks. The bolts I have some have different letter/number on the head, some none.

[Brian]

This is what I have found.  Obviously will not need the washer, but the bolts look correct.  Any opinions?

http://www.ebay.com/itm/1964-72-Oldsmobile-Cutlass-V8-Exhaust-Manifold-Bolts-Washers-20pc-OEM-NOS-/370785467991?pt=Vintage_Car_Truck_Parts_Accessories&hash=item5654893e57&vxp=mtr#ht_1475wt_1154

[Mark Ascher]

I'll get some pics later and post them. The length in Bill's picture looks about right.
I don't think the french lock fits under the alternator bracket, so I'll yank one of those out.

Mark

[Brian]

I visited Tractor Supply next door over lunch break and lo and behold, the grade-5 bolts they carry are the black/dark olive color zinc!    They have them in 1" and 1.5", so I got 20 of each.   I can easily cut the 1.5" ones to 1.25" length in my lathe.