Supposing you have a forged rod motor, you could probably get away with little jet. id start with the smallest jet you have(around a .020 or so) and maybe bump it up a little from there if you still have smoke.
If you have powered metal rods, id be very leary of running it especially with the ts 140 tune. Ideally you would want to run a tune made for running nitrous (timing adjusted accordingly).
like mentioned above tho, ultimately a larger turbo and some injectors are a far better route to take.
i would send my chip to swamps for a custom tune. i have forged rods. and im just pulling local in the modified diesel class with a stock truck. i know i dont have much fuel left but im just looking for 50hp
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