66 fuel pump question
Thread Starter
8th Gear
Joined: Oct 2012
Posts: 8
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66 fuel pump question
Trying to figure out the correct fuel pump for my 66 327/300hp. Engine with a April 66 build date. I have what I think is the original fuel pump 133V40018. Can anyone tell me if this is correct? Some have said a late build 66 used the 40043 for 67. Is the 40018 correct?
Thanks,
JB66
Thanks,
JB66
Melting Slicks
Joined: Aug 2004
Posts: 2,058
Likes: 554
From: Sun Prairie WI
You need a "4657" pump -- very common, with inlet and outlet ports approx. 90* apart and the numbers 4657 stamped on the edge of one mounting flange. Airtex, AC, perhaps others. The GM part number is 6415616; the ACD #40018. OEM pumps had AC cast on the boss on top and on the bottom cover & some other peculiarities. Later versions & Airtex do not, but are fully functional. Here's a couple pics of one in my stash o' spares.
Thread Starter
8th Gear
Joined: Oct 2012
Posts: 8
Likes: 0
Thank you Vark. I have been told that the late version fuel pump was different than the 4657. I have a late April 66. That is why I posted this question in the forum.kept getting different answers. I appreciate your advice on this. So the 4657 is correct for my car?
JB66
JB66
Safety Car
Joined: May 2014
Posts: 3,787
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In 1967 the 300hp fuel pump changed to a crimp style and the part # is 40433, I am not sure if your April 66 car could have used it or when the change over happened.
Have you checked the NCRS judging guide, there may be some info there.
Have you checked the NCRS judging guide, there may be some info there.
