Mopar Muscle Association UK

Hi Need to replace the mech fuel pump on the 400 cu in b engine, original pumps were 20gpm 5/16" inlet.
already has an aftermarket uprated one on it but not sure what its rating is, was thinking of using the 71 440 cuda one as has 3/8" inlet and 33gpm and can get from rock auto
Will this fit ok does anyone know and any suggestion's, car is rated 480hp

I used the Carter M4862 Big Block Mopar pump in my 440-6, worked well.

Keep an eye on the push rod - they can wear and cause problems with under-fuelling especially at higher rpms...

These flow 120 US GPH so not sure where you get your figures....

The Carter mechanical pump solved a fuel starvation issue I had with a hot 440, you do need to use a fuel pressure regulator with it though.

tks for info guys, sorry it meant 20gph minimum, That is the one i was looking at will give it a go

I must admit I did not use a pressure regulator on my 6 Pak set up, but then again the carbs may have been bleeding off more pressure than a 4bbl set up...never suffered from float bowls flooding or over-fueling.

found my issue luckily had a spare one worn bigtime
still gonna renew pump though

Very common issue on big blocks. If you can believe what you read on the forums, the new replacements wear more rapidly than original parts.

Agreed, you can get some with different finished ends and different materials. I tried to use originals where possible.

I used to carry spare pushrods in the car - that's how much they can wear!!!

blimey didnt know that its an original one i have fitted

they had that problem with the 'crop duster' on roadkill garage, the engine fell flat at half track (1/8 mile) as it was running out of fuel in the carb float bowls.

Interesting, where do you buy just pushrods?

bought an ARP one to keep as as pare from amazon google 440 fuel pump pushrod and have a look at the options