red line

I used to rev mine to 4500 all the time. That way, when the A904 shifted, it would continue to pull.Otherwise the rpm was so low going into second, she would drag her azz a long ways before picking up again. 4800/5000 was better,yet.
Leave the cam alone for now.
Wait for the hi-stall. It will make the biggest difference off the line.Especially with that cam.
2.94s suck!, even 3.55s are not enough to really wake up a slanty.That cam demands Performance gears. But really the 904 has a 1-2 split of 59%, meaning that whatever you rev it too, the rpm will drop to 59%. So if you rev it to 4500, the Rs will drop to 2650ish,plus slip, and that is a deep dark hole for a 268* cam to pull out of. Ima thinking that slanty is gonna want a 3000TC or better. And if that is close, then hi-way cruising is not gonna be a lotta fun, so you might as well give it up and go straight to 3.91s! Between those two, your slanty is finally gonna wake up.Top of second will be about 60/65 mph, depending on tire size and where you decide to rev her to.
Cruising the hi-way 60 might be about 3000 to 3200
By the way,with your current combo,moving the cam 3* is almost pointless .For me it would not be worth the time.