<VV> Corvair engine date code

[shortle]

This engine dated T1109RH has the 3/8X16 bolts (large) holding on the top shroud. It does not have any 1/4X20 bolts on the top shroud. I am going to get the date codes off the alternator,carb. tags, and off the distributor shortly as well as off the product plate. 
This engine/heads may have been changed and probably was (though engine looks almost like it has never been out of car based on all the originality of its appearance- All shrouds/bolts/exhaust hanger still in place, no tears or wrinkling of engine seal, etc.).
But one of my questions is still unanswered. Did ANY '65 engines come with the big bolt heads?
This question may be unanswerable with certainty. Expect more information as the present workload today is minor and I can only clean the shop only so many times.
Timothy Shortle in Durango Colorado
My shop is becoming very clean  


-----Original Message-----
>From: Bryan Blackwell <bryan at skiblack.com>
>Sent: Oct 14, 2010 12:15 PM
>To: shortle <shortle556 at earthlink.net>
>Cc: Virtual Vairs <virtualvairs at corvair.org>
>Subject: Re: <VV> Corvair engine date code
>
>Let's be a little more specific - '60 to '65 heads have two 3/8" bolts on the top of the head to hold the top shroud on, the remaining 3 or 4 are 5/16 as I recall.  The '66 - up heads have 3/8" bolts for all of these holes.  This change was for the '66 140 high mount a/c compressor, as I recall.  So, the short answer is that all '65 engines had the mix of bolts, the '66 up had all "big" bolts.  I don't know the exact date of the change, however, but I seem to recall there was a Communique article on the subject.
>
>--Bryan
>
>On Oct 14, 2010, at 10:34 AM, shortle wrote:
>
>> Tony, Lon, and All,
>> The "big bolts" I was referring to are the bolts holding the top shroud. They are the 3/8X16 threads per inch. I have only seen these heads on '66 and later. Did any '65's have these "big bolt" heads? And by the way, the paint is Evening Orchid (not orchard). 
>> Timothy Shortle in Durango Colorado 
>