Get the PWK carbs. Why?
1. They are cheaper
2. They are more easily found used (cheaper)
3. Getting jetting advice will be easier
4. They will work for your setup and riding style.
5. Easier to sell when you part your bike out.
Thinking of taking the smerv to the 300' hill and sand drags. What tire you you pick if these are all you had to choose from. All of these are about 3/4. Cyclone"v" paddles , hole shits (not cut) and bearclaws.
I dunno if it makes any difference but I'm running a tad rich with 160 mains on my 421 -serval with procircuts. I do have 35 pwks though. just for reference cause it seems you're waaaayyyy rich.