Help with TH400 tag ID
 

Got a friend who bought a '51 Pontiac with an SBC/TH400 combo. So far, the engine seems to code out to a 1974 police cruiser. He can't find any info on the trans tag. 90 - LRA - 13912 0095
Anyone know where to find this info, or know what it is from ?
Thanks

'

If any Vin stamping, year/plant/sequence digits may help w/ clues?:hmmm:
:beers:
~ Pete

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I'll ask him to look for a vin stamp on the case. Should be on the left side ?

It appears this is a 1990 THM400/3l80. Anyone know where to find info on this ? I've spent hours searching and can't find anything on the www for the LRA code.
Thanks