Is driving a Monte SS with a 350 really that different to drive from a GN?
Yes.
It sounds like you've never ridden in one.
$ for $, compare riding in a stock trim of each, and then, including your engine purchase and rebuild costs (by someone on each side who KNOW what they're doing and has their car tuned) compare any 350 monte to a ttype/gn with the same drivetrain money invested.
There is no comparison until you're into 5 figures and hundreds of hours of personal labor that both cars are so far from stock as to not be applicable.
But 1000x yes.
I love the GN but it just seems like a car that is getting sold from owner to owner via auction and never driven and enjoyed.
Go visit turbobuick.com
There's thousands of those cars getting driven harder, blown up pushing the limits, and driven even harder again than any other performance gbody.
There is a collector following, but really it's just because more people recognized when the cars were new it was something special and wanted to save it. That happened much more rarely with the 442. Did happen with the monte, but more because of sheer production volume.