how much?
On the nitrous, what are your internals like?? Need a little more specific info to get the correct anwsers to your question.
What brand internals??
You say its puttin down 385 now stock, thats no LS1, so still you need to list exactly what type of motor & rotating assembly before anyone will be able to help.
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I'd seriously consider using a stand-alone fuel system to feed the direct port fogger so you can use the race gas only when needed.
edit: I'd also use a race type of sparkplug for that like an Autolite AR472


