Its alive 68 coupe - continued

It seems a very short tyre for a 4.56 gear, i run 29.5 tyres and i'm turning 7000rpm at the stripe and with my old axle with 4.30 gears, i was turning 6700.
I had a Duster 383 with a slightly larger solid comp cam than yours, that ran 12.60 easy and sounded nastier than the big roller in my 440.