EFI Fuel System

I considered an Inline, using the stock pickup, but not sure what to do about a return. I'm running a FITECH electric pump in my Hemi swapped A100 Pickup, but I have a fuel cell in thst.. Using the corvette style filter. Works great. Looking at the Aces Killshot efi system. I had a look at the install instructions and it stated 42-48psi min. But doesn't state a max. I'll probably reach out to them and see what max is. They've got a good sale going.. 20% off. I can get the complete kit with distributor fand handheld for complete tuning for less than $850. Pretty clean setup that auto tunes as well.
Any info on the aces setup?? Any positive reviews from actual experience??