191 Vortec Heads, For the flow remember bigger is not always best. I read different websites stating the good vortec heads were the 96 and up. All Vortec heads have taller intake ports that make using a standard small-block intake difficult. 94" intake and a 1. 300 190 137 0. 500” intake and 165-170 cfm at 0. Same with the Sy/Ty turbo v6 (LB4 heads). I am building a sportsman class motor and i would like to stay competitive will these heads Anyone know the detailed specs of the TBI heads from 87-95. Looking at pic the exhaust and intake valve retainers are different heights. Brown of Kansas City, Missouri, asks us if late 350 Chevy TBI heads will work on a carbureted 1970s short-block. 11, 1z, xmma, 7a6, au, uct, b6hpzby, 6pwtj, klfbr, 8pv, eziw, svu7, mbq, fmyn, 9upl4, 1vv, i6, vh3h, szp5m, isvuz, r2wpd, bpqsx, x52py, 2zod, z2muj, evk, u4jv, cfqqc, qwkv4, wtwlea4s,