Yes, the vortec pump will work for you with a stock spring, 15 PSI Spring, or 18 PSI spring.
It seems unlikely your engine will require 80 LB / HR injectors with an 18 PSI spring . . . calculated flow of 94.1 LB / HR.
My personal TBI tuning experience does not align with countless internet posts about the "required TBI Fuel Pressures and required TBI Injector flows".
A TBI 502 engine requires using 80 Lb / HR Injectors with an 18 PSI fuel pressure spring . . . calculated flow of 94.1 LB / HR.
If it was my Blueprint 355, I would use 8 port injectors not two TBI injectors. . . see pictures below
Holley 7540.jpg
Holley 300-263_01.jpg
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