hey guys. I have decided to go the vortec head route and need some info. I am gonna start looking around for a good used set and was wondering if any casting are better than others and if so, what years/models should I look for them in? Also, when i go to order headers, what model do i order?


Will the SD manifold work with any vortec head or with only specific castings? Sorry for all the questions. Any help would be greatly apreciated.

 

10239906
12558062

These are the two casting #'s for Vortec heads.

GM used them in all 5700 Vortec 350 motors. Trucks, Tahoe's , etc.


I've heard it said, but haven't had it verified, that you should avoid the 906 castings that came from 3/4, 1 ton Trucks. Something to do with different exhaust seats impeding flow.


Go to www.car-part.com

plug in a 1996 Chevy Tahoe / Suburban , I've seen them as low as $120 each used.

Also, the stock valve springs are only good until about .480" lift or so... anything beyond that would need new springs.


A vortec head is a Vortec head.


Use regular SBC headers.


HTH

 

i have the vortech heads - the 906 castings
if you blend the valve seat then lifes good

been happy with my setup
got me mid 13's on motor
and 12.20's on a small n2o kit
on bidgestones and gm torque converter

mike

 

i have a set of the 062 off my uncles 98 k1500 350. i took one head apart and no carbon build-up on the valve's at all. i have lapped the valve's on one head and going to get some valve stem seals. i see so nasty ones selling on ebay for $312. i'm asking $300 with valve job and new seals. best of luck, tom