I believe all the Vortec-era small blocks are roller cam. When I searched for a first year (in trucks) Vortec 1996 C1500, RockAuto gave me the same results as the ‘85 GMC van I had. I bought a crap-ton of the Fram FPS5 (Ultra, but without grip coating) filters when they went on clearance for $1.04, so the XG5, etc should work. If you want Wix, it’s a 51060 or 1060 (if you buy a NAPA-branded one. The 51061 (or 1061) is the same filter, but without an anti-drainback valve. ADBV not so much of a big issue on a small block Chevy due to it not mounting on its side or upside down, etc.