[FC] spark plug numbers

[rash44]

Greetings out there-  Can anyone tell me what the difference is between
an AC plug appended with an "S" versus an "X", as in 44FFX/44FFS???.  I understand the FF part, and I know that one or the other is an extended tip. The difference is------------?? Does any one care to comment on the relative performance of an extended tip?  I would think it would provide a more even or symmetric flame front.  Thanks for your comments.
Ralph in Daytona with a 63 Rampy.

-----Original Message-----
>From: corvanatics-request at corvair.org
>Sent: Nov 5, 2008 12:00 PM
>To: corvanatics at corvair.org
>Subject: Corvanatics Digest, Vol 46, Issue 5
>
>Send Corvanatics mailing list submissions to
>	corvanatics at corvair.org
>
>To subscribe or unsubscribe via the World Wide Web, visit
>	http://www.vv.corvair.org/mailman/listinfo/corvanatics
>or, via email, send a message with subject or body 'help' to
>	corvanatics-request at corvair.org
>
>You can reach the person managing the list at
>	corvanatics-owner at corvair.org
>
>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of Corvanatics digest..."
>
>
>Today's Topics:
>
>   1. Re: Serial #s and State Registration (Paul Steinberg)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Tue, 4 Nov 2008 12:07:45 -0500
>From: "Paul Steinberg" <noahsarkinc at earthlink.net>
>Subject: Re: [FC] Serial #s and State Registration
>To: <judgehouston at yahoo.com>,	<corvanatics at corvair.org>
>Message-ID: <E68878F885684923BAE6C036CB631962 at paul>
>Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>	reply-type=original
>
>I was living in NH in the early 1960's, and my 1963 Spyder was registered as 
>a 1962, since it was manufactured in October 1962.  Had it been made in 
>January 1963, then it would have been registered as a 1963.  All this had to 
>do with how vehicles were taxed.  Vehicles were depreciated each year, so 
>the tax amount would go down.  Many states then and now, tax vehicles as 
>"property tax", and you keep paying on the value.  In CT, my 1964 Spyder 
>would be valued at $15,000 and taxed at $18 per thousand dollars of value, 
>if I didn't have collector plates on it.  With collector plates, the value 
>is a fixed $500, or $9 tax per year.
>Paul in CT
>----- Original Message ----- 
>From: "David Houston" <judgehouston at yahoo.com>
>To: <corvanatics at corvair.org>
>Sent: Tuesday, November 04, 2008 11:38 AM
>Subject: Re: [FC] Serial #s and State Registration
>
>
>I started selling used cars and trucks back in 1969. I remember many used 
>trucks would be registered as a year earlier than the model year. Many 
>states had no Titles till the mid-1970's. A state sales tax form somestimes 
>served that purpose, but wasn't necessary. Another Greenbrier owner I know 
>in NH recently purchased a 1963 in Phoenix. When he received the AZ Title, 
>it stated his van was purchased for $2400 in February, 1962. The serial # 
>starts with a '3' and is titled a 1963. I currently live in a state where 
>titles aren't needed after 15 years. Odometer readings after 10 years.
>
>
>
>_______________________________________________
>Corvanatics mailing list
>Corvanatics at corvair.org
>http://www.vv.corvair.org/mailman/listinfo/corvanatics
>This list sponsored by the Corvair Society of America, 
>http://www.corvair.org/
>
>
>--------------------------------------------------------------------------------
>
>
>
>No virus found in this incoming message.
>Checked by AVG - http://www.avg.com
>Version: 8.0.175 / Virus Database: 270.8.6/1766 - Release Date: 11/4/2008 
>8:26 AM
>
>
>
>------------------------------
>
>_______________________________________________
>Corvanatics mailing list
>Corvanatics at corvair.org
>http://www.vv.corvair.org/mailman/listinfo/corvanatics
>This list sponsored by the Corvair Society of America, http://www.corvair.org/
>
>End of Corvanatics Digest, Vol 46, Issue 5
>******************************************