why does everybody call it NOS, this is not fast and the furious. NOS is a brand name. Nitrous Oxide N2O is whats its called.
Damn ! You beat me to it Raf. Only children and people new to the automotive world call it that. Most hot rodders frown on people calling nitrous by that moniker. Most gearheads won't take people seriously if they say " NOS" (I feel sick just spelling it.)
Now ...back on topic. I've used spray on 3 of my drag racing vehicles in the past. I spent a year researching it's uses and how it would best serve me. I hung around several speed shops and drag strips across North America , custom engine buiders etc (pre-internet days) I've run as little as a 75HP shot to a whopping 150HP shot
Would I run it in my tired tractor engine six-banger?
HELLS NOOoO !!! Now, I'm not saying that it CAN'T be done( and for reasonable cash outlay) You can purchase a "Sneaky Pete" system that has a small tank and will maybe eke out 50HP(maybe) Will your tired six hang in there? Maybe? Maybe not? I'd rather not find out the hard way.
A bigger throttle body on a stock 4.O is money well wasted IMHO. So you want to go from a 60MM throttle body to an aftermarket 62MM throttle body? The stock TB is more than up to the task of your flow requirements(rated to 25OHP). Chips? I like barbecue flavoured Pringles.
In the end; it's up to you and what you want to do. It's your Jeep and your money.