Bruce Lang is running a 470 in his 68 NSS barracuda with the TF270s and a Modman with 1 1/2 spacer best of 9.48 @ 3200 lbs.
I just can't seem to get my combination to work that well.
Primarily was wondering if I needed to go with more duration on my cam, like 280ish.
Sounds like a good idea. A couple of days on the dyno swapping intakes will give you a good baseline to work from. I have a customer with a similar car and engine combo to what you have and he runs high 9's. The biggest difference is he has a ported Super Victor intake and he is at 3400 lbs on the starting line.
