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Re: Survey; Which relay to power fuel pump.
The ECM control is the way to go. I believe this is so important I have put my money where my mouth is. I installed a aftermarket fuel pump controller for the fuel pump on my Burban.
You might be able to have both ways. I suggest looking to see if you can control the AAW harness relay with the ECM signal. Thus your extra wiring would be under the hood or dash.
Fortunately fuel pumps don't draw a bunch of amperage so the wire size doesn't have to be very large. Usually a 14 AWG will suffice.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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