I have Edelbrock Proflo1 for about 20 years now, it is the original non sequential ported system with halleffect distributor. I can upgrade to the ProFlo3 but that is a complete purchase ... back in the day we could have done a Proflo1 to 2 upgrade with new harness and CPU; now they want you to drop down 3k for all new. I see the Holley HP EFI universal kit; pretty much is an upgrade from the Proflo1 to something newer with Wideband a ton of features and if I want spark control I have to get an add on. All for about 1/3 less; I think this is a good path ... does anybody have experience with the Holley HP? Does anyone have experience with Proflo and Holley to make the comparison?