The Northstar is super old though, if they put money into it or came up with a new DOHC V8 it would be a different story. When the Northstar came out in 1992 it was making 300 hp. The LT1 5.7 liter of the day was making 250-260 hp, except for the Corvette that got a 300 hp version in the early 90s.
Ignoring facts will get you nowhere:
The LT1 in the B-bodies got 260hp.
The LT1 in the F-bodies got 275hp.
The LT1 in the Corvette got 300hp.
Lesser trim Cadillacs got a 275hp version of the Northstar.
If you want to exclude the 300hp LT1 from this argument, I'm fine with that, as long as you also exclude the 300hp Northstar. The fact is, it's basically a wash between the LT1 and Northstar. I'll add that the LT1 has a pretty high ceiling. The 330hp LT4 of 1996 was a LT1 with a different head design. And, using parts available from GM, my father is building one up that should be good for 465hp, not that that's entirely relevant.
I'm not necessarily dismissing DOHC engines, but you're dead wrong on the pushrod engine. And the fact is, not everyone who buys a European sports sedan agress with you. Consider:
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