Re: Help with numbers on my 401
It could be a 401, but not a magnum based on the intake manifold but,
The numbers you have in your first picture are the same stamped on my
401M: CWG4 2476579
So it may very well be a 401.
Here is what I have stamped on the front engine pad just below the right-side head.
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1961 GMC Suburban 305A Overdrive
1962 GMC Utility 305D
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