The numbers don't lie. It may be hard to believe because you don't want to believe it, but I saw a lot of turbo Dodges put "muscle cars" to shame back in the day. Especially after a computer upgrade to increase the boost pressure. A $135 stage 1 computer would put that GLHS at 205 hp with a power to weight ratio of 11.2 lb/hp.
Of course they don't – the GN was faster, but the GLHS was capable of beating it, just like what I said but you seemed to miss.
And talking about modified cars spanking cars you have no idea how they were modified (or not)? Not a good way to make a point.
The original question was if it's believable that a Shelby Dodge could be faster than a Grand National and I think I proved that point. However, if you want to split hairs some more the published quarter mile times for the 1986-87 GLHS and GN were 14.7 sec. So in stock form they're at least equals.
I think the only reason they are remembered for being fast is, due to almost immediate aftermarket support, All the street GNs were modified beyond stock.
People here getting bent out of shape about it too.
http://www.yellowbullet.com/forum/showthread.php?t=569319Even the Grand National boys like the GLHS;
https://turbobuick.com/threads/omni-glh-turbo.100833/
