I thought I might as well throw in my useless knowledge. I am running the HP EFI and found it to be extremely easy to tune. I was able to download
the V4 version and study it and just get used to where things were. You could do this and maybe see where the difference are between the 950 and the HP EFI. If you haven't been to the resources site on Holley https://www.holley.com/support/resources/, this is where I found a lot of useful information.

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