My best with my 3.4 Whipple crusher is 9.81 @ 139.8 (6.27 1/8 mile). I'm trying to get this bad boy into the 5's and I don't think the 3.4 has it in her. Maybe if I upped it to 30 pounds. Anyway I'm wondering if a ported 2.65 on 28 pounds could get me there.
The 3.4 on a stock long block most definitely has 5's in it on a full weight car, and will do it at 28#'s 3.25 upper/stock lower. Been there.