Re: manifold spacers

[Tedscj@aol.com]

Well, I must admit that I haven't seen them in person my self, but I've read 
this information from any number of "reliable" sources including vendors.  
Maybe it's a scam to sell more "Vortec" manifolds, but then they might sell 
more heads if they were more "plug and play".
Anyhow, I just won a couple of new ones on EBAY for just above wholesale, 
which is hard to do these days given their popularity, so i will find out 
what the ports are actually like when I get them.
Could it be that you got something other than the "L31" castings?  The heads 
I just got are "062" castings which are the latest  "L31 Vortec" castings.  
THey have the 170cc intake runners and 64cc chambers.  They are replacements 
for the Vortec 350 V8s going back to '96.

Not really EFI any more... sorry,
Ted



In a message dated 6/17/00 11:42:05 PM Eastern Daylight Time, 
dave.williams@chaos.lrk.ar.us writes:

> I've seen that go by a couple of times today.  The Chevy Vortec heads -
>  1993-1998 TBI pickup truck heads, identified as "Vortec" in the Chevy
>  parts catalog - do not have raised intake ports.  I bought a brand new
>  pair from Chevrolet, and the port openings are in about the same spot as
>  any other Chevy heads.  In fact, the port openings are actually smaller
>  than ordinary 441 or 882 open chamber heads.
>  
>   The exhaust ports are also in the standard locations.
>  
>   The Vortec heads have a three-angle valve job (standard Chevy heads
>  were single angle before that), 1.94/1.50 valves, single valve springs,
>  small diameter stainless steel spring retainers, Perfect Circle type
>  valve stem seals, and the valves themselves lack the O-ring groove for
>  the old-type seal Chevy went to in 1960.  (1959 and back small blocks
>  had no oil seals at all)
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