Hi New Member here Randy Berger

Welcome from Texas! Nice score on the Swinger. I just finished a Duster project and put on a Sniper 2 EFI and really like it, but there are a few considerations:
1) You need to be able to install an O2 sensor on one exhaust side 4-6 inches past your collector;
2) You need a high-volume fuel pump to get consistent 55-60 pressure for the EFI. I used Holley's in-tank pump with a built in regulator so I didn't need a return fuel line.
The unit itself doesn't draw a lot of power and the wiring is pretty straightforward.
It runs great on my 350 HP small block - and is really nice on cold mornings, making starting and warmup much less troublesome. But, like everything else on our cars & trucks - it ain't cheap!