I just finished this job on my 98. If you are seeing those torque values on other sites, I'd say they were accurate. I'm sure they are in the 95 FSM. As mentioned, there are no published numbers for the snout to SC. I have seen 15 ft lbs, but honestly, I don't use torque wrenches for something like this, I just use my common sense and snug the bolt up. I have seen guys strip out fasteners using a torque wrench. Not sure why, maybe user error, or mis calibration. Completely unnecessary IMO.
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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