Perhaps I'm overlooking something obvious, but why shouldn't i install my AFPR directly following the external EFI fuel pump. The pump is located 1' forward of the tank, under the trunk space. I seems to me that placing it here would save a whole lot of tubing by shortening, almost eliminating, the return line. From there i would only have to run one high-pressure line to my TBI unit.

Aside from the less convenient adjustment, what other drawbacks can you imagine might exist?

-Zander

 

You could. That's what they did with LS1's after a year or two.

Advantage of having the reg up by the engine is you don't have slow-moving fuel picking up heat along the way. If the reg is up by the engine, you'll have fuel moving quickly meaning it'll have less time in the line to pick up heat.