Hello ChrisRomello,
The drop in tank unit is a fuel return less type. The fuel pressure (58 psi) regulator and fuel return is built in to the assembly (see picture).
The Sniper EFI unit has its own built in regulator and provisions for a return line that would be used if installing the inline pump (master kit).
There are pros and cons to using the in-tank setup. You can do some research here on the various topics.
Holley Sniper EFI owners and Tech
Also I strongly recommend reading the complete Holley instructions before starting the install process.
https://documents.holley.com/199r11031r.pdf
I have installed Sniper EFI on a couple customers cars and my choice is running a in-tank pump without the regulator and a return from the Sniper itself back to the tank (see picture with # 6AN bulkhead fitting)
Stay Safe...
Happy Mopar :)
Arron.
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