A friend of mine owns a chevrolet Lumina ss which is somelike your GTO. The SS is powered by a 360 hp 6.0-litre V8 with 530 Nm of torque and a four-speed automatic. Who will win in a race? from stop and from a roll.
My stang has sct tune and jlt intake.

Note that the Lumina ss is found in the middle east reqion only. to give you an idea it is almost like youre gto but uglier

 

If only 360 HP and if about the same weight as the GTO, even with similar mods like your Mustang, I'd say Mustang from a stop. S197s are known to beat 04 GTOs with 340 HP 5.7L v8 in a like-for-like race (either both fairly stock or both with similar mods). 20 HP should not make a difference. From a roll, I have no idea as I don't "roll" that way.

 

You shouldnt have any problem beating him.

 

only one real way to find out.........

 

I dunno, I thought the ME Lumina was pretty bad ****, if I was a Chevy man, I'd feel cheated here in the states.

It really comes down to weight, if the Lumina SS weighs in the neighborhood of 4,000 lbs, you shouldn't have a problem.

 

Does your friends Lumina SS look like this one?

 

I'm not a big Lumina fan but I don't think that looks bad.

 

looks like cobalt or cavalier but if it weigh's 4,000 lbs then your deff good to go

 

My thoughts exactly