'72 350/200 auto, intake manifold bolts?

[Douglas M.]

I see there are a few different intake manifold bolt sets available, some all TR headstamp, other set with 10 M headstamp and two double circle headstamp (longer),


edit, I also see some A headstamp bolts in a paragon catalog....

Are either correct? is one set better to use than another based on other bolt head stamps on my motor?

If so, what headstamps should I look for?

Also: is the vacuum fitting in front of the dizzy that the TH400 vacuum line attaches to painted or bare metal?

The good news is, the lifter that kept going out of adjustment, and I had feared was a cam lobe going bad turned out to be a pushrod ball end that was wearing away quickly; a spare rocker arms and pushrod fixed that easily enough.

Thanks,
Doug

[Edward J.]

Re: '72 350/200 auto, intake manifold bolts?

Doug, My 72 350 L48 has its original bolts and there are a C marking, I am sure there are others that are acceptible.

[Terry M.]

Re: '72 350/200 auto, intake manifold bolts?

Doug, My 72 350 L48 has its original bolts and there are a C marking, I am sure there are others that are acceptible.

Are they all the same head mark, Ed?

[Edward J.]

Re: '72 350/200 auto, intake manifold bolts?

Are they all the same head mark, Ed?

Terry, I will have to look, I think the ones that have the engine lift bracket maybe different,at least the bolt heads are.

I looked at the head they appear to be a C but the eye site is not what it use to be.

[Terry M.]

Re: '72 350/200 auto, intake manifold bolts?

Terry, I will have to look, I think the ones that have the engine lift bracket maybe different,at least the bolt heads are.

I looked at the head they appear to be a C but the eye site is not what it use to be.

Ed,

I would expect the lift bracket fasteners to be different. Those bolts are longer and as you mention have a different head configuration. Having those fasteners the same head mark as the others would be like winning the lottery. Also just the normal mixing of suppliers might yield different head marks in the same supply bin, but maybe you can hit the power ball.

[Douglas M.]

Re: '72 350/200 auto, intake manifold bolts?

My dizzy lockdown bracket bolt has a C on it. the coil bracket bolts have B on them.The manifold bolts were all replaced with hardware store fasteners.

As long as headstamp does not matter, i will select one that I like.

Thanks,

Doug

[Terry M.]

Re: '72 350/200 auto, intake manifold bolts?

My dizzy lockdown bracket bolt has a C on it. the coil bracket bolts have B on them.The manifold bolts were all replaced with hardware store fasteners.

As long as headstamp does not matter, i will select one that I like.

Thanks,

Doug

Doug,
I don't read anyone stating the head mark(s) doesn't/don't matter, but it is your car and you can do what you want.

There is a 1972 base engined manual trans here at the National Convention that is pretty original. The owner is Patrick Hulst and any of his posts on this board contain links to a site with myriad of pictures of his car. There may be some pictures of the intake manifold fasteners on his car posted there. Why not take a look? I can not imagine the transmission style will make any difference to the manifold fasteners used, but WTFDIK.

[Douglas M.]

Re: '72 350/200 auto, intake manifold bolts?

Maybe they do matter, i believe i even saw an admonishment ina paragon catlog to ask a qualified NCRS person about what headstamp is correct.

The impression i am getting is some may be more correct than others based on engine plant or maybe time of year it was built, but nobody really knows, or if they do know, they aren't saying.

Doug

[Steven G.]

Re: '72 350/200 auto, intake manifold bolts?

I looked at my #3187, 72' base engine, m/t, intake bolts, they have "C",marking, the lift bolts have a built on washer with "A" marking and are about 1/4" longer, I'd bet they are factory installed bolts !!!! Steve

[Patrick H.]

Re: '72 350/200 auto, intake manifold bolts?

I expect different bolts for spark plug holders and for the lifting eye. There is also a stud that may be on the right holding the spark solenoid. The remainder of the bolts generally match.