I planned on just throwing a 450 in my stock bucket on my 01, with 60 lb injectors. But now looks like I cant? Looking to support about 550-600whp. Could I run the stock pump, somehow fabricate a 450 to the bucket, and have it turn on at a set boost psi?

 

Your stock bucket is just fine. The fpr and larger fuel line is what you need then.

 

Are lines really nessecary for 700rwhp, I have seen similar power levels using 3/8 (-6) line.

 

I'm still running stock lines. The problem is the stock fpr. It can't handle the flow of the 450.

 

Im running a walbro 400 on stock lines and return style flex fuel rails found on the 03 suburban/tahoes. I feel I should be around 650 wheel with this setup.

 

you need a adjustable FPR I'm running the same pump and my FP was at 80PSI with the stock FPR

 

This maybe a dumb question but it never hurts to ask is the SSS return or returnless fuel systems

 

Depends what year it is.

 

Sorry bout that it's a 2003

 

03 was the last year they did the return style 04 up was return less