As some of you have already read and some have gave some VERY helpful info, I am installing 1.9 Yella Terra's on the GS. I have already purchased the YT RR's (duh), VC gaskets x2, CC rocker bolt, assy lube, CC 90lb springs, and zzp retainers. I have a few questions.

1.)What the hell is the name of the neumatic tool to pump the cylinder up and how much do I pump it up to keep the valve up?
2.)What 'poundage' do I torque the YT's to? I have heard 23, and I have heard 11 with a 90 degree turn.
3.) Should I go ahead and get new OEM valve seals since Im there; and are they(seals) hard to put in and not loose the valve down da hole?
Many Thanks