holenhqss, I've always done them one at a time because of working on many different motors with different firing orders. On a SBC, I turn the motor until #1 intake is at full lift, then turn the crank one complete revolution and adjust #1 intake, then turn the crank 1/4 turn (90 degrees) and adjust #8 intake, then another 1/4 turn and adjust #4 intake and so forth. When I'm through with the intakes, I start from the beginning on #1 exhaust at full lift, give the crank one full turn, adjust #1 exhaust and so on. This may be the slow and dumb way to do it, but in this manner, I'm assured that the cam lobe is exactly on the heel when I adjust that valve. Here's a chart that does the same thing, they just say it in a different way, you're still turning the crank 1/4 turn at a time...
http://www.centuryperformance.com/va...sp#Quick%20Way

If you don't have the specs on the cam showing the lash, I'd set them cold at 0.025" to start the motor. Then when the motor is up to temp, adjust them again hot at 0.022" to 0.026", your choice. tightening up the lash will effectively give you more duration and add power on the top end, while loosening the lash will effectively decrease the duration and make more bottom end power.