Valvetrain complete, but a few ???'s

Finally got a chance to get my valvetrain back together.

273 rocker arms (slightly clearanced for valve springs)
Mopar Chrome rocker shafts
Mopar adjustable rocker hardware
Crane pushrods

This is the first time I have EVER set up adjustable rockers. I'm not sure I got it 100%..I followed the instructions as per Racer Browns website. At startup they make just a little bit of noise, but once it warms up it sounds good. I've been told it is better to err on the side on conservatism, and it's OK this way (maybe even normal), than the alternative of being too tight and damaging something.

Is this true? Or should I readjust the rockers with just a bit more preload on them? I set them to the point where there was just barely no verticle movement in the pushrod, then gave it another 1/2 turn on the adjuster.

I will say that even cold it starts WAY easier (like immediately) when I hit the key. In the past the first start of the day was always a bit harder to start.

Also I have an oiling question: I installed an Amsoil bypass oil kit (remote mount) on my car. Now when I first start it, there is no oil pressure for a few seconds, and you can DEFINATELY hear it. I am pretty sure it is due to some of the oil draining back in to the pan. One friend recommended I just put in a crank switch to spin the motor prior to starting to build up oil pressure. This would be easy, but would I be better off installing a check valve on my oil line to prevent the oil from draining back through the oil pump to the pan?

Just want to make sure I'm doing it right.