https://www.summitracing.com/search/...20-gph-454-lph
it does look like the 110G type pumps are still available if you'd like to get the same of what you already have. you may want to put an inline fuel presure gauge to validate what's going on.
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1979 Firebird Trans Am 301/4spd (Now 428)
1977 Firebird Formula 400/Auto
2007 Grand Prix GXP 5.3L
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