Just pulled one of my valve covers for the first time.....and my car has 10207643 castings. I believe the car was built in June of '95.

Can't really see it in this pic, but I just pulled the valve cover to see how clean it was (installing my cam in a week, just trying to get an idea if I'm going to be installing a cam in a dirty engine or a clean engine), but here you go. http://www.mattz28.com/Caminstall/DSC00883.JPG

Did these heads come on some early '96 cars?

 

Does it really matter?

 

Thanks for the informative reply!

And no, it doesn't really matter, other than the fact that I can probably get more money for them. I was curious...sorry if that offended you, and sorry for asking a question on a forum. I sincerely apologize....dickhole

 

Wow I didn't think you would resort to name calling over a comment like that. LMAO The only reason I said what I did is because I see people posting about the part numbers on the heads and the power difference between them. I think it's rediculous.

 

I think he had though he would find #561 heads...I don't know why you didn't, probly early model with left-over castings on the assembly line.

 

I'm not posting about the power differences or whatever...I really don't care about that. I just have never seen these castings on a '96 motor before, that's all.

Anyways, the car wasn't build in 6/95 like I thought (don't know why I thought that...). I just went and looked, and it was built 1/96

 

rediculous?
Isn't a main purpose of these forums for obtaining information? And sharing it if you have it? And if not let someone reply who does. I don't, but have been searching for answers to Matt's question for a few hours now to try to help him and have not come up with a definite answer. I'm sure there are some members on here that have the correct info without doing all the searching, but I don't and he obviously doesn't either. So yes I think it does matter to him and I wouldn't mind knowing the info concerning this subject myself. So I guess it does matter to some of us. JMO

Matt, I haven't come up with much info but I see that looking for part#'s based on the casting # doesn't necessarily work right.
----
I see that casting # 10207643 listed as 94-96 here but I don't see #10168448 listed in that chart. But I see that # listed as the part # for 1996 LT1 in this chart.
So I'm already getting lost on the # thing.
Try this;
A search for cylinder head by part# on Mitchell via GM parts direct shows:

part details
Description: CYLINDER HEAD
Part #: 10168448
Categories:
Mechanical > GROUP 4 - ENGINE > HEAD & VALVES

Make Model Year(s) Application

Chevrolet Camaro
1994-1997
V8
Chevrolet Corvette
1994-1996
Eng VIN P
Pontiac Firebird
1994-1997
V8
================
Search for 1997:
Same results=
Description: CYLINDER HEAD
Part #: 10168448
Categories:
Mechanical > GROUP 4 - ENGINE > HEAD & VALVES
Chevrolet Camaro
1994-1997
V8
Chevrolet Corvette
1994-1996
Eng VIN P
Pontiac Firebird
1994-1997
V8
===========
For 1993 =
Description: CYLINDER HEAD
Part #: 10205244
Categories:
Mechanical > GROUP 4 - ENGINE > HEAD & VALVES

Make Model Year(s) Application
Chevrolet Camaro
1993
V8
Chevrolet Corvette
1993
Eng VIN P
1992
O.H.V.
Pontiac Firebird
1993
V8
==========
==========
Now by part #10207643:

Note: The part numbers that you searched for were not found. Please enter new part numbers to search, or try browsing our parts catalog.
-------------
So I guess the part # is a different reference than casting # based on the info chart you are veiwing..
I've got to get some sleep. If you don't get an answer I'll try to help figure out something tommorrow for ya.

 

You know I had always thought the 96's had the 561's... Atleast thats what I was told, read and had expexted. I pulled my stock heads off a few weeks ago and they were 643's. I dont know whay but its apparently not uncommon. As already stated I bet they just used up old stock in the transition over to the 561 castings.

 

My question is what's the diff between the two?

 

http://web.camaross.com/forums/showthread.php?t=427346

 

Awesome, thanks.

 

There ya go again...working without tools. That's why you shouldn't be allowed to think without adult supervision.

 

I probably know more about fbodies than you ever will, so maybe YOU should've had adult supervision before quoting me! The heads are so similar that there is really no point in using one head over the other. It's good that he now knows the part number of the heads on his car.

 

Well then I guess that shows how much you know. The 643 castings can make a noticeable increase in power over the 561's when fully ported. Why would 643's be preferred for porting if they are "so similar"?

 

And after that post I'm 100% sure I know more about F-bodies than you, and that being said, I'm sure Lloyd Elliot or Advanced Inductoin know more than you as well, since both request 643 castings over 561 castings any day. In stock form 561's outflow the 643's by a bit, but the 643's have more room/material for porting and will make power power at the end of the day than the 561's.

Case in point, I pulled 561 heads off my car and bought a set of 643's to have ported.