1970 3350/300 intake manifold head marks

[Steve D.]

just wondering what others have. Mine appear to be a triangle with 3 stake marks. I know some sources call for a M headmark

[Terry M.]

Re: 1970 3350/300 intake manifold head marks

just wondering what others have. Mine appear to be a triangle with 3 stake marks. I know some sources call for a M headmark

They are all the same head mark Steve?
Do you think they are original to the car?

[David L.]

Re: 1970 3350/300 intake manifold head marks

Steve,

I'm confused. What do you mean by intake manifold "head marks"?

Dave

[Steve D.]

Re: 1970 3350/300 intake manifold head marks

David, the mark on top of the bolts that hold down the intake. Terry, they are all the same. the previouss owner said they were the bolts that were on the car when he purchased it in 1999

[David L.]

Re: 1970 3350/300 intake manifold head marks

Steve,

The word "bolt" was not mentioned at all in your original post.

Does your intake have a large letter "S" or a large letter "T"?
I assume "S" = Saginaw and I know that "T" = Tonowanda.

Dave

[Steve D.]

Re: 1970 3350/300 intake manifold head marks

Dave, exactly where would the letter T or S be located?

[David L.]

Re: 1970 3350/300 intake manifold head marks

Steve,

My 70 Camaro SS350 intake has a large letter "T" (for Tonowanda, NY) cast near the "3965577" casting number (casting date is "B 26 70"). and a large "R" (for Rochester) near the water outlet. The engine was made in Tonowanda.

I believe that the 70 Corvette 300HP intakes (same "3965577" casting number but with a single digit year casting date) have a large letter "S" cast near the water outlet were made in Saginaw, MI, as the engines were made in Flint, MI.

Dave

[Pat M.]

Re: 1970 3350/300 intake manifold head marks

Steve, my base 70's manifold has bolts all with the headmarks you describe. I don't know if they're original to the car.

Mine also may have an "S" near the water outlet, but whatever it is it's covered with fairly thick paint and it's hard to tell.