back when I used to play with nitrous on cars, you could l hardly feel a 50 shot. there were times a passenger would have to ask if you sprayed it. and that was 3000lb cars. I honestly don't know if a 50 shot would go anything to a 5500lb truck.. maybe change the exhaust tone a bit? only thing we ever found a small shot good for was a small turbo car. they loved the stuff, being so cold you could run even more boost while on it too. still nothing by today's hp numbers but fun.
I think you'd need the full small solenoid flow, about 150 ish.