BMX cranks for charge scissor

i'd be more concerned about pedal strike on the ground when turning sharply...

I run 170mm Profiles on a Volume Cutter and it's not a major issue but it has happened a couple of times...so with 175mm obviously the clearance is less.... just my 2¢

also. wondering about barspin. Do you think a 175mm cranks would make to much toe overlap and if so what would be a good size crankarm.