Had an Olds 307 in a 1985 Cutlass. It was leisurely at best but adequate. Owned many 3.8’s in my life but the supercharged Series II in my 1997 Riviera was the best. I wouldn’t mind another.
Had a 4.0 Northstar in a new 1996 Aurora (although it was never advertised as a Northstar but was a 4.0 version), it used a quart of oil every 1,200 miles. I dumped it and went back to a 3800. Never again considered a Northstar.