what choices of cams do i have for a 1997 sierra l31 5.7l 350

 

Comp Cams probably has a good choice, check out their site. What kind of idle and drivability do you want?

 

You still running the TBI system or the single TB system (forgot the name please tell me) SFI i think

 

Here is what Comp Cams has for your Vortec:
Competition Cams Computer Controlled Xtreme Energy Camshafts 87-98 w/Hyd. Roller

Part #
CCA-08-500-8 Camshaft, Hydraulic Roller Tappet, Advertised Duration 258/ 264, Lift .480/ .488, Chevy Small Block

CCA-08-502-8 Camshaft, Hydraulic Roller Tappet, Advertised Duration 269/ 276, Lift .495/ .503, Chevy Small Block

CCA-08-501-8 Camshaft, Hydraulic Roller Tappet, Advertised Duration 264/ 269, Lift .488/ .495, Chevy Small Block

CCA-08-503-8 Camshaft, Hydraulic Roller Tappet, Advertised Duration 276/ 281, Lift .503/ .510, Chevy Small Block

Hope this leads you in the right direction!