View Full Version : 350 GM Vortec Heads
Rootsy
03-09-2002, 06:17 PM
anyone have a set of production 350 vortec cylinder heads they want to part with?
James, I can't help you with the heads but you obviously have something up your sleeve. What's up ?
Sam
Looped
03-10-2002, 08:56 AM
James,
I just recently bought 2 new Vortec heads that I will be using on my sbc stroker motor. They actually make two different models of the Vortec heads 10239906 & 12558062. I have the “062” type but I have been told that the differences between the two are the runners, what the difference is I still have not found out yet??
Good luck,
Craig
Rootsy
03-10-2002, 09:42 AM
Looped,
are you sure that one of the two aren't for the 305? the 305 Vortec's have smaller valves i do believe.
Looped
03-10-2002, 10:33 AM
James,
Those 305 heads that you are talking about have a 1.84"/1.5" valve size with a casting numbers of 12552520 & 12558059 maybe others too. The 2 350 heads (062 & 906) have the identical valves (1.94/1.5), 64cc chambers & 170cc intake ports. It was something in the way that the runners are shaped or the route that they run???
Craig
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