Fuel pump p/n for vin 9 H/O ??

[83hurst#1812]

The original equip fuel pump went out yesterday on my 83 H/O.. Looking thru the GM parts' manual,,all I can find is p/n's for vin Y 307s GM 6471743 ( ACDelco 41567 ). I can find the p/n for 85-87 vin 9's GM 6472172 ( ACDelco 42218 ) Anyone know if either of these is correct for an 83 vin 9 ? My car is all original,and I want to keep it that way,,so i'd like to get the OE pump for it...I actually have the 42218 ,but trying to make sure it is right for this car

 

[88hurstolds]

I'd use the 42218, the 41567 was for standard Y's and used in '83 VIN9s but the engineers changed for a reason in '84...

 

[DoubleV]

What's the difference between them?

 

[83hurst#1812]

Don't know.. I now have both and side by side there is no physical difference.. But , from 88hurstolds and Cruzn 66 ( classicoldsmobile.com) advice, i am installing the 42218

 

[kustomkyle]

I've never heard of a separate fuel pump for the VIN 9 engines as opposed to a VIN Y version. I'm thinking the aftermarket considers them all the same if I remember right.

Hopefully someone explains what the differences actually were according to GM. In the older cars sometimes you had 5/16" line fittings for lower performance engines and 3/8" fittings for higher performance engines. The pump-to-carburetor line is 3/8" on my 1986 VIN Y, so maybe the inlet size could be different somehow? I'm not seeing where a 20+ MPG 180 horsepower, low compression smog engine would need different fuel flow than it's 140 horsepower brother.