1967 327/300 Hp

[Timothy B.]

Can anyone tell me what the correct bolt looks like that holds the alternater brace to the drivers side exhaust manifold. The bolt I removed is indented head E, grade five with captured lock washer about 7/8" long. Looks like a battery box to frame bolt and I am not sure it's correct.

Thanks for the help, I can't wonder if this bolt should be grade eight as I removed a single WB grade eight from the intake manifold but it's the same length as the other intake bolts. All the rest of the intake bolts are grade five and headmark NAT.

[Dale S.]

Re: 1967 327/300 Hp

Tim, I found I had a flat head grade 5, KS bolt. It looks too new to be original, so I need to know also. Thank you Dale

[Gerard F.]

Re: 1967 327/300 Hp

Tim,

Here's mine on a 67/327/300:



I don't think it has ever been off the car, but it is anyone's guess what the head marking is.

The lower alternator pivot bolt is an SBC, and the lower brace bolt to the water pump looks like(?)a painted SBC also. The upper alternator adjusting bolt is a NAT.

If no one guesses, maybe I'll try to clean it up tomorrow, and take another shot.

On your carb post, if you have the standard cast iron 4 hole intake for a 327/300, you don't have to worry about the two extra baseplate to body screws falling into the intake. With other one or two hole intakes you do.
You should use Loctite in any case.

I added the two extra screws on my 3810, and for some reason they had already been tapped but lacked the screws.

[Timothy B.]

Re: 1967 327/300 Hp

Thanks for the help Dale and Jerry,

Jerry, If you feel like wire brushing it to show headmark and grade I would appreciate it. On my 63, the alternator attaching brace to exhaust manifold has two grade eight WB bolts only they are 7/16" in size that's why I am thinking this may be grade eight also.

This bracket is installed at Flint engine with some orange paint so I find it hard to believe the battery box/strut rod type bolt would be used..

[Peter L.]

Re: 1967 327/300 Hp

Grade 5 (3-lines) SBC bolt and split ring lock washer (67 S/N 1476) Pete

[Gerard F.]

Re: 1967 327/300 Hp

Tim,

A little Simple Green and some steel wool, here it is:



Looks like a C with three spokes. Or is that a circle in the center.
There's a lock washer to the bracket. Not sure of the grade.

Don't think this has ever been off the car, as the mainfolds or bracket have never been off. That's original paint on the bracket.

[Peter L.]

Re: 1967 327/300 Hp

The headmark I posted previously was for the alternator pivot bolt. The head mark of the bolt that attached the bracket to the exhaust manifold is a "M" with 3 lines (grade 5). It also has a split ring lock washer. Pete

[Gerard F.]

Re: 1967 327/300 Hp

Pete,

Probably "M" for manifold

Just couldn't resist Pete, only kidding

See you soon.

[Dale S.]

Re: 1967 327/300 Hp

Jerry, Mine has a SBC in that postion( it has some old orange paint on the sides of the flats). Pete has a M for the pivot and you have SBC. Any others? Dale

[Timothy B.]

Re: 1967 327/300 Hp

Thanks for the response everyone, I have a few of the M and C bolts around somewhere and will use one. Probably M for "manifold", keeps things straight in my head.

I appreciate everyone's patience with my simple questions..

[Peter L.]

Re: 1967 327/300 Hp

Jerry - Very clever. . I was wondering how they did it at the factory. My car "M"ust be special. Pete

[Timothy B.]

Re: 1967 327/300 Hp

Is the bolt we are talking about supposed to be orange? How about the water pump bolt where the brackets attach to the pump? Thanks as always..

[Gerard F.]

Re: 1967 327/300 Hp

I would think that the bolt we are talking about (to the manifold) would have been painted with the engine as it holds the painted bracket to the engine. Not too sure about the other one, as the black painted bracket was added after the engine was painted.

But I've been wrong before.

[John H.]

Re: 1967 327/300 Hp

How about the water pump bolt where the brackets attach to the pump? Thanks as always..

That bolt and lockwasher are called out in the Assembly Manual with part numbers, so the engine plant-installed water pump bolt was removed at St. Louis and trashed, and replaced by the phosphated new bolt and split lockwasher.