Here's a few.
http://www.ebay.com/itm/1995-AURORA-RIVIERA-FACTORY-SERVICE-MANUALS-BOOKS-1-2-OF-2-/131162779249?pt=Motors_Manuals_Literature&hash=item1e89e92e71&vxp=mtr
http://www.ebay.com/itm/1995-G-Platform-Aurora-Riviera-Service-Manual-Book-1-of-2-/400692167304?pt=Motors_Manuals_Literature&hash=item5d4b1d4288&vxp=mtr
http://www.ebay.com/itm/1995-G-Platform-Aurora-Riviera-Service-Manual-Book-2-of-2-/121316278807?pt=Motors_Manuals_Literature&hash=item1c3f038217&vxp=mtr
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98 Riviera SC3800 All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU