Stock...... 90% of american "muscle cars" were way more bark than bite. The imports we compare modern american sports cars to are out dated by over a decade now. A stock Silvia would out run probably every single production muscle car from the 60s-70s-80s and most of the 90s. A 454ss Chevelle is a mid 15 second car on a good day. 90s Mustangs (sn95s are the ones im talking about, not foxbodies) were some of the slowest cars on the road. Your avg fullsize work truck would beat a mustang from light to light.
PreLS1 chevys were nothing to write home about either.