That cam has 286 duration @ 50. It will kill some of your bottom end, Sound awesome and run really strong thru 7800 to 8000 grand. I think your set up would respond better with a 266 - 274 @ 50 cam. What do your SR heads flow above 600 lift?
My cousin has a similar 67 car to yours except he has a 4.56 gear and runs 29.5 X 10.50 drag slicks. He just replaced a bigger cam with a Bullet Roller cam I had that has 266 @ 50 w/ 110 lobe seperation installed at 108 and it has 670 lift. His old cam was a 286 @ 50 cam. His car is quicker and faster with the smaller cam. He has an old set of Zeeker heads that flow really well in the mid range up to 700 lift. He has a 5000 stall converter (I think).