would porting my stock heads be a good idea while running a 100 shot..and if so what flow numbers should I aim for. I would possible install a hotcam aswell

 

match the cam with the flow numbers.if you want a hotcam get the porter to match them up.

there is no reason to port the heads specifically for nitrous.and even if you were gonna port the heads for nitrous,there are no magical or specific numbers to aim for.

 

With a wet kit some people leave the intake part of the head a little rougher than usual when porting to prevent fuel puddling. So maybe a 40 grit instead of an 80 grit?