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			#1  
			
			
			
			
			
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|  original GM 3899621 bell housing 
			
			Hi Friends, I have an original GM bell housing - 3899621 / 621 which is certainly genuine and is in as found condition with no fluffing or even cleaning - ready to clean up and use as is for a patina'd original car. It's clearly been off a car for years and is dirty & dusty as shown - it certainly needs cleaning, but no repair required that I have noticed. And when tapped, it, of course, rings like a bell - no cracks is my conclusion. This is of course the 3899621 bell housing for a factory 11" clutch - should also work for any Big Block or car that used the big clutch, LS5 L78 L34 L35 L89 L71 and SS350 Camaros. 1970 Z/28 cars as well I believe. A nice piece not often found in original condition anymore and a perfect start to restore or use now after cleaning - bolt holes all look good and threads and tabs - includes the transmission mounting big bolts and lock washers as shown. See the photos below. I do have this cross posted. Thanks again, cheers everyone. Anthony | 
| The Following User Says Thank You to AnthonyS For This Useful Post: | ||
|  1969L89Corvette (04-19-2025) | ||
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			#2  
			
			
			
			
			
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			Correct for second gen Z28s thru 73, and probably 74 as well.
		 
				__________________ Bill Pritchard 73 Camaro RS Z28, L82, M20, C60 Last edited by Bill Pritchard; 12-09-2024 at 10:37 PM. Reason: added "second gen" for clarification | 
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			#3  
			
			
			
			
			
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			HI  correct for big blocks 1967-1971
		 
				__________________ Barry Allan | 
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			#4  
			
			
			
			
			
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			Actually, not correct for Z/28, 67-69.  They use the 403. Also not correct for ZL1. For some reason that application uses the 403. 70 and later (at least through the early 70s) Z/28 does use the 621, as does 70 and later LT-1 Corvette. 
				__________________ Don't believe everything you read on the internet ... Ben Franklin | 
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			#5  
			
			
			
			
			
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			Corrected my post to what I really meant, since Anthony had mentioned 70 Z28s in the OP.
		 
				__________________ Bill Pritchard 73 Camaro RS Z28, L82, M20, C60 | 
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			#6  
			
			
			
			
			
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			Bolts and washers no longer available / included. Reach out with interest, thanks friends. Anthony | 
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			#7  
			
			
			
			
			
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			...bump for this bellhousing
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			#8  
			
			
			
			
			
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			bumping again. Thanks all. | 
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			#9  
			
			
			
			
			
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			bump
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