I can get fuel rails made for probably 150 bucks or so. when you move the reg. after the rail, you just run a return line back to where the stock return was for the stock fpr.

Without the regulator after the rail, the rail has virtually no flow, just pressure. It only flows what the injectors move and that leads to starvation.

Think about putting your finger over a garden hose, all this pressure but no flow... doesnt really do much does it? thats the same way our factory fuel systems are.