1967 427 Marine block with no stamp??

[Eddie G.]

hello, i have a 351 427 engine complete from a marine boat. and it looks like there are no stamps on it, and does not seem to be decked. looks like original Pad Broach marks to me. the date is J-14-6 and the heads are 3904391 and the heads have just a date of /20 no year. ?? here are pics so you can check it out. anyone need it? cheers...Ed

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

here are more pics

[Doug M.]

Re: 1967 427 Marine block with no stamp??

Eddie,

I have a an unstamped 351 block, H 66 casting date at machine shop now. It has a Tonawanda stamping on very bottom of block

at oil filter area.

Doug

[John D.]

Re: 1967 427 Marine block with no stamp??

Is there a deck height difference on marine blocks ?

[Joe L.]

Re: 1967 427 Marine block with no stamp??

Is there a deck height difference on marine blocks ?

John------


There can be but they would not have the 3904391 casting number. That block has the standard passenger car 9.8" block.

[Loren L.]

Re: 1967 427 Marine block with no stamp??

"I20" =s September 2, 1970?

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

ow, so 67 block with 70 heads.

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

i will try and look next time i see the boat.

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

i dont think that head was made in 70. thanks, Ed

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

The Block is 3904351 not 91

John------


There can be but they would not have the 3904391 casting number. That block has the standard passenger car 9.8" block.

[Joe L.]

Re: 1967 427 Marine block with no stamp??

The Block is 3904351 not 91

Eddie-----


Yes, that was a typo on my part. There was no block of 3904391.

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

hello, do you have a picture. thanks, Ed

Eddie,

I have a an unstamped 351 block, H 66 casting date at machine shop now. It has a Tonawanda stamping on very bottom of block

at oil filter area.

Doug

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

can you explain yourself on 9.8 block passenger car? whats the difference my 67 vette has a 3904351 block also.
Thanks, Ed

Eddie-----


Yes, that was a typo on my part. There was no block of 3904391.

[Eddie G.]

Re: 1967 427 Marine block with no stamp??

its a / dash not an I and they did not make that head in 70. thanks, Ed

"I20" =s September 2, 1970?

[Patrick B.]

Re: 1967 427 Marine block with no stamp??

"I20" =s September 2, 1970?

It should read I 20 6. The foundry left the 6 off the metal tab screwed to the wooden pattern used to form the sand mold. 3904391 heads were cast only during the 1967 model year. None were cast in 1970.