<VV> PG BELLHOUSING DIFFERENCES plus

[BobHelt at aol.com]

In a message dated 2/15/2008 6:59:59 AM US Mountain Standard Time,  
N2VZD at aol.com writes:

can  anyone tell me the real difference between early and late pg   
bellhousings?
if i use the early flex plate and early bellhousing it  should be close  
enough?  or is the crank size an  issue?



Hi Tim,
Well basically the PG bellhousings follow the revisions made to the MT  
housings. Since the MT clutches were different for the 1960-63 and 1964-69, you  
need to separate the PG bellhousings into these two groups too.
Then you should match the combinations of crank hub/flexplate and  
bellhousing for either EM or LM.
 
The crank hubs are not easilly identified separately, but you can be pretty  
much assured that the crank casting numbers will be a good identifier.
The flexplates can be identified in that the LM one has a 1/8 in hole in  the 
6-bolt circle.
The bellhousings can be identified by their casting numbers. EM=6255599,  
LM=3832517.
 
OK, the answer to your question is.......
The main oil seal contact surface on the hub was relocated rearward by  0.070 
in. on the LM bellhousing.
 
Regards,
Bob Helt



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