Thread: 454 marine engine questions
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11-28-2006 10:50 PM #31
You're not going to know what is inside of the block based on the numbers on the outside. The 427-502 all use the same block, I believe.
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11-28-2006 10:54 PM #32
Originally Posted by 76GMC1500
Last edited by pat mccarthy; 11-28-2006 at 11:16 PM.
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11-28-2006 10:58 PM #33
Okay... that complicates things LOL. Oh well, that's why I am asking questions here before I do anything stupid.
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11-30-2006 02:17 PM #34
Well, I still can't make out the block casting #, but it has 7.4 stamped on the side so it's a 454. Anyhow, the heads are peanut, 14092360. So some 049's or 781 are definitely in order to increase the horsepower LOL.
You're welcome Mike, glad it worked out for you. Roger, it's taken a few years but my inventory of excess parts has shrunk a fair bit from 1 1/2 garage stalls to about an eight by eight space. ...
1968 Plymouth Valiant 1st Gen HEMI