Hey Quigs,I've been running the n3cj for years in my gasser 300's and have settled on a 178 main,42 pilot,middle (or 3rd clip on the needle) and finally air screw around 1.5 turns out.
This will be fine at your altitude and temps.
200m-1200m elevation and 10-35 deg celcius is the range I ride in with my combo, in our summer I'll raise the clip one position and still never been lean.
Don't forget your float level too!