318 1/8 time improvement

Supposed to be some really fast junk there. The car I’m helping on has been in the 3.80s in the 1/8 on a prepped track. Twin turbo Pro Line deal, very serious car.
My friends car is not finished yet, I'm sure (procharged solid block KB hemi, in a promod avenger) but his street car is a turboed ls stroker in a malibu (1200 hp) and his stepson has a mustang that has been low 4s (2000+hp).