slightly different but similar stuff here. You need ot make sure the Sniper will work dead heading the fuel. I did my multiport back in '09 (commander 950) but different set-up with different requirements DEAD HEAD on multiport is NOT a great idea so mounted my return regulator on END of fuel rail using the original feed line as a return. Made NEW 1/2 FEED line from the LS1 fuel pump bucket in the tank to the rails.
Given the sniper is a throttle body type unit dead head SHOULD be OK. The 1 advantage of mounting the return regulator UP FRONT is fuel circulation.
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