442/.465), stock unmodified GM Vortec Heads, Edelbrock …Vortec Bowtie cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance. Whether this was a TBI upgraded with Vortec heads and intake or an 元1 downgraded with a factory flat-tappet cam actually mattered not for .7 Top Best Performance Cams For 350 With Vortec Heads Comparisons .With COMP Cams 252H (with 0.425 valve lift) or Summit K1103 Cam (Duration 272/282, Lift. Several years back I read a Hot Rod article …31 jan. It is a guess but I think cam #3 will likely make the most power with the Vortec Heads. I would also spend a little time cleaning of the sharp edges under the exhaust valves.1,150 Posts. More exhaust duration really helps out the vortec head. Set total mechanical advance timing at 35 degrees. Should make about 325hp with a set of vortec heads. 442 Adv/Dur: 278/288 These specs are the same as the Edelbrock cam that is produced for use with the Performer intake, which I am also using.The cam has 204/214 duration with 0.420"/0.442" lift. I am re-doing them right now and want to use a Melling camshaft. 2500 converter, 2700-3200 cruise RPM, 9.5 to 10.75.I decided to use a set of 1996 Vortec heads (062s) I had for my 350 build. usage, mild bracket racing, auto trans w/stock to. Good mid range torque, good to fair idle, daily performance. This is the SAME cam Competion Cams made their street creds on when it is called the 268 High Energy cam. Biggest cam for vortec heads Exhaust 216 DUR.
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