Mid 12's with a 318 head 360?

I believe you without doubt.
I built a few big block street cars I the 90s.... with 4spds. That being said, ain't NO car I ever had, jumped to 6500.on the tach instantly, with just a mash of the gas.. other than my 340.... they Are Badass.. ( no offense to 318willrun. Or 318s.. lol
I've had a Few of em, tuned up a few more, and drove some that WERE WICKED. The one in my D200, 4 dr It would leave a rolling burnout w/o the brake. Just sick, for what it was...