Fuel pump tech

jsmay

Well Known Member
Hey guys, I’m replacing the fuel pump(40018) on my 300hp 327 64’ impala.. I believe it could be the original one.. I’ve noticed 40083 for 64-66 350hp 327 and it looks to be index-able and rebuildable.. how much difference if any is there between these too.. thanks
 

jsmay

Well Known Member
Thanks guys, I’m gonna go that route. $50 on eBay.. no one local Nashville has any. Crazy!
 

blkss64

Well Known Member
On one of my 64's I had, I tried to use a Delco 40018 but it was physically a larger pump. It would not bolt on the engine as it contacted the frame. I ended up using an Airtex 4657 pump. It was a smaller sized pump casting. Still a cast pump with screws, not the Unitac later style GM service replacement pump.
 
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