Mechanical Fuel Pump, direction?

[Beach_Dude]

I have a 1977 360 and going back to mechanical... I know I'm gonna get best, but it's not for reliability.

Being a 1977, not one TSM shows the direction for the fuel pump, and I know somewhere around here was a transition between the years.

Does it point up or down?

If it points up, it seems AWFULLY close to the steering pump brackets. Is that normal?

Does anyone have images of their pump and how close it it to their support brackets for the other pumps?

[SJTD]

Been many moons since I messed with a mechanical pump but aren't the mounting holes offset toward the top so if you put it in upside down the mounting surfaces won't match up.

Don't ferget a dab-o-grease on the arm.

[babywag]

The pump only installs one way, arm under the eccentric.
Top usually has fuel outlet, bottom has fuel inlet.
If it's too close to PS maybe a longer belt is needed?

Be prepared the mechanical pumps are cheapnese now and some are total crap.
Longevity is also an issue...last mech. pump I bought only lasted ~1yr and heard similar from other folks.

I may be totally wrong on pump fitting locations...been sooo many years since laid eyes on one.
Electric would be my first choice these days.

[DBX11]

If I am not mistaken there are two types for our 360s.
Type A is where the diaphragm is over the inlet/outlet
Type B is where the diaphragm is under the inlet/outlet
I ran into a problem when trying to install power steering in a non power steering equipped j10.

[78basicwag]

Mine is a 1978 Wagoneer and the inlet and outlet are pointing up.

[Ristow]

i don't think you can put them on upside down. the arm is offset,and so are the bolt holes. later ones pointed up starting in early mid seventies. i think my '74 pointed down.

[SC/397]

This is the upside-down style like 78basicwag shows. And the Scummit picture shows it up-side down for even more confusion. Finding a good fuel pump has been a mixed bag for me. I have had good luck with this particular one but have sent others back because they pump out too much pressure causing flooding.

https://www.summitracing.com/parts/CRT-M6736

[wiley-moeracing]

you could always add a regulator?

[SC/397]

Yep, I had to put a regulator on the engine that went to England.

[WT77]

This is the upside-down style like 78basicwag shows. And the Scummit picture shows it up-side down for even more confusion. Finding a good fuel pump has been a mixed bag for me. I have had good luck with this particular one but have sent others back because they pump out too much pressure causing flooding.

https://www.summitracing.com/parts/CRT-M6736

How could too much pressure cause flooding if you have a return fuel line? Seems that any excess pressure would be released through the return line and not be applied to the float needle valve. I'm just thinking here.

[Ristow]

the return line is an orificed line. the pump sets the pressure,and puts out more volume than the return line can handle. the return line is merely to keep fuel moving and purge vapors back to the tank. it is in no way meant to regulate pressure at all.

[SC/397]

How could too much pressure cause flooding if you have a return fuel line? Seems that any excess pressure would be released through the return line and not be applied to the float needle valve. I'm just thinking here.

Anything more than 5 or 6 psi on a Holley.

Didn't have a return line.

[tgreese]

This is the upside-down style like 78basicwag shows. And the Scummit picture shows it up-side down for even more confusion. Finding a good fuel pump has been a mixed bag for me. I have had good luck with this particular one but have sent others back because they pump out too much pressure causing flooding.

https://www.summitracing.com/parts/CRT-M6736

Recently bought a Spectra Premium pump for my J20 to replace an Airtex that was only 3 yo and failed. So far so good. Clearly marked on the pump body "Made in USA" FWIW.