So your engine is built?
Mine is and I am staying with the stock rail for now and there won't be any fuel delivery issues at all.
Waste your money elsewhere.....btw don't bother with a SVAFC either they are pretty much useless...oh and an aftermarket igniton will also be useless until you are really pushing some numbers out of the engine.
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"I'll keep my money, guns and freedom. You can keep the "Change."