v6 vortec heads

Got a 96 4.3 vortec auto 2wd reg cab, and want to know about the heads and cam. What size are the intake and exhuast valves, combustion chamber size, compression, cam lift and duration. thanks

hp cu.in. comp./ fueling/ rocker/lifter comb.vol.

170 262 9.2 / PFI / 1.50 /Hyd.Roller 62.0 cc

170 262 .025 deck, Flat w/n pistons, 1.940/1.500 I/E valves, .400/.393 lift

You might call Comp Cams for duration numbers

thanks, thats great info.