Can anyone decode these?

Can anyone decode these two VIN's? Thanks in advance, also can you do this with a chassis service manual? :TU:

2H 4Y87U2H902285


2T 4Y87U2H90664

 

bob over at buicks.net says

http://www.buicks.net/cgi-bin/forum/ultimatebb.cgi/ubb/get_topic/f/15/t/000039.html?
"I'm probably wrong,

4=buick
y=ventura
87=coupe,2dr hardtop
u=v8,400,455
2=1972
h=flint
...serial number"

i'm sure he's wrong about the 'y'. ventura was a pontiac, was it not? i can't believe you've got a couple of apollo's, i don't believe they ever had big blocks.

 

That is a 72 Riviera vin sequence

 

After searching the web a bit i finally found a few things, both a Rivieras, 1972, and arent GS's.