1977 350 help

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Apr 22, 2016 | 12:48 PM

#41

Shown50

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Joined: Apr 2016

Posts: 19

Quote:

Originally Posted by olds 307 and 403

I guess but probably is a 403. There is a casting number behind the water pump beside the oil fill tube. The 77 and up have displacement cast into the side of the block, should be a big 403.

Its a 350 block other things I remember seeing were PMD 350 can't remember the other numbers but I do remember seeing the casting number with the 55 beginning code and the intake number was different (I do know the difference in firing order numbers) it also had a wheel or star looking symbol. Ill be with the car in a couple hours.