just wanting to stoke the fire a little when i build my engines i always have the pisotns balanced to 1/2 gram the rods balanced end to end and the crank and flywheel and front pulley as well this makes for a very smooth running engine and also worth a few bhp as well, which as we all know every pony counts.
if you are wanting to build a hi comp motor as most of mine are i go this route
4.6 cross bolted block top hat linnered
4.6 crank
4.6 rods
4.0 pistons
give a comp ratio of 10.4-1 with comp gaskets
also a 22cc in the crown of the piston 28cc in the head and the the comp gasket also all pistons are cc balanced alonmg with the heads