My dead stock all factory original 66 Valiant, slant and three-on-the-tree went a best of 19.8 in the 1/4. I have an 82 D150, slant with 833 OD but unfortunately it was a dead dog when I got it. I will be able to post some numbers in a few weeks when it's ready to get back on the street, but it's a lightly warmed up slant. Given it's pushing a heavy brick, I imagine about the same times or worse.