Fired 'er up for the first time, but...

[adz]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; May 16 2007, 04&#58;14 PM) [snapback]93727[/snapback]</div>

So, you&#39;re fuel rail has a pressure AND return line on it? All truck engines I have seen only have a pressure side. I preach the Corvette style regulated fuel filter to everyone and I have yet to hear a single complaint about fuel problems, other than the hose coming off the fuel pump because they used cheap hose or didnt&#39; double clamp the connections. The Corvette fuel filter takes the 3/8" fuel pressure line into the filter and when it exceeds 58lbs returns it back to the tank through the 5/16" line. The opposite side of the filter continues the 3/8" fuel path to the fuel rail and it never sees the fuel tank again.
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Yup. It has both lines right at the fuel rail. As does the engine on my parents truck, and my friend&#39;s suburban I believe. There is a little regulator on the fuel rail near the inlet, and the schrader valve is on the opposite side of the fuel rail.

I had my 350 set up with TBI from a &#39;90, so I left the wiring for the fuel pump, and I had it wired through a kill switch. I&#39;m starting to wonder if the wiring isn&#39;t holding the voltage on the pump back, but admittedly I am now grasping at straws.

[adz]

<div class='quotetop'>QUOTE(adz55 &#064; May 16 2007, 04&#58;25 PM) [snapback]93731[/snapback]</div>

I had my 350 set up with TBI from a &#39;90, so I left the wiring for the fuel pump, and I had it wired through a kill switch. I&#39;m starting to wonder if the wiring isn&#39;t holding the voltage on the pump back, but admittedly I am now grasping at straws.
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Guess what the problem was all along&#33; The crappy wiring to the pump was keeping it from running at full pressure. It&#39;s running great now&#33; I guess that&#39;s a lesson to anyone else out there doing a swap; make sure you run good, thick wiring with good connections to your fuel pump&#33;

Thanks for all of your help