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'Red alert' sound, fuel pressure woes


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New poster here...

Just installed a new motor in the 71 240:

F54/N47, comp cams 280s cam, 3x 40dcoe, headers, exedy regular clutch, flywheel from my l24, new timing kit, carter p4070, Holley 12-804 reg, mallory dist from l24.


Also replaced 4 speed with 5 speed close-ratio. Using fork and collar from 240 trans because whatever collar came with 280 was too long and slave cylinder couldn't be mounted.


The car makes a very odd sonar, red alert sound. It happens with the clutch pedal out and minor revs. Doesn't seem to increase with engine speed. Sounds like it's coming from the bell housing area... Strange. Also, I had to cut the tunnel/console to fit the shifter. Not needed with close-ratio?? Not so fast! I think the trans has an older bell housing on it. Serial 7y1594(1?). Oy. Gears 2 and 3 are mighty close, it must be the right tranny. New redline mt90 in the trans, too.


Next problem:


Carter pump mounted by tank, constant 12v. No need for regulator? Yeah right. Carbs poured gas out right away! Installed low pressure Holley 12-804 after filter in engine bay. Fuel pressure okay on initial startup, I checked it after a min and it was creeping up past 7psi. Adjust reg, no difference. Not running a return. Fuel is fed to carbs via 5/16" line.


I thought these pumps had a bypass that would send gas back to the tank?

I'll upload a short video of the sound ASAP.

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