Setup DEX210 for TORCH

[badgio]

I found James Kerr's setup for the 210 at TORCH decided it would be good starting point as I know very little about setup as you will tell from my first question...

He says to use 3 hole piston 1.6 on the front and 4 hole 1.6 on the rear, the kit seems to comes with 8 x 6 hole pistons and 4 that have no holes. I think one of the guys down at the track mentioned drilling your own holes don't think I really want to get involved with that so can anybody recommend where to buy these? They don't seem to sell them on the Durango site and a Google search doesn't seem to bring up much.

And what does the 1.6 mean?

Cheers guys!!