Re: LT1 rocker arms
Can you yes. Should you...well that's debatable. You stock springs won't last long with the added lift, and the benefit from going to 1.6 from 1.5 is marginal if you are not going full roller. Lot's of threads out there on what springs you can run and recommended rockers.
1994 Z28 - 6.27L - 4L80 - 9"
1995 Z28 - 5.7L - T56
1995 Vette - 5.7L - ZF6 - Dana44