<VV> odd casting number

[Mark Corbin]

If that's the listing, it might just be a "first design '66 head" -
actually a '65 head that had the new mold with larger bosses for the
'66-later bolts.

The '65 head is known for its two-size turkey roaster bolts, while
'66-later heads used all one size. That was no doubt because of the need
for larger bolts to hold the a/c high-mount compressor bracket securely. To
do this, larger bosses had to be incorporated in the mold.

-Mark


> [Original Message]
> Subject: RE: <VV> odd casting number
>
> http://www.corvaircraft.com/ lists 3883864 as a 65-66 140 no-smog head 
>
> - Steve Brown
> '62 Rampside
> Media, PA
>
> Original Message:
> -----------------
> Subject: <VV> odd casting number
>
> All,
>
> Got the following letter from Tom Silvey about an unusual casting number
on
> a 140 head he has:
>
> "Found something strange this week. From my numerous supply of 140 heads I
> had selected two heads for a 140 engine I am buinding for my '67 a/c four
> door car. Of course, I picked the best late heads with the 3/8 threads for
> the a/c and the solid head stud boss. However, I found that both heads did
> not have the same part number. One has 3/8 holes for the a/c and the
> remainder of the holes are 1/4-20. The bosses for the 3/8 holes have not
> been added but are cast. The P/N are 3878370 and 3883864 for the strange
> head. My guess is that it is an early '66. Can not find my list of head
> part numbers so do not know now."
>
> Tom also gave me the name of Corvette Central as a good source (according
> to friend Tom Cate) of Corvair tele column repair parts. Their number is
> 1-800-345-4122.
>
> BTW, I'm CC'ing Tom with this, if anyone wants to respond directly to him.
>
> -Mark