OK, the compression ratio and power expectation helps with cam selection, IMO.
I don't have any TF combo to compare to, but this is my input.
511 CID with TF270 heads can make 700 hp pretty easily. I would prefer slightly over 11.0 CR, so if the final chamber size (milling heads?) and space above the piston (compression height and valve reliefs can get you closer to 11.5 CR; that would be nice.
The header choice will have people liking both. But I say for mostly street and a 4-speed, go with the smaller headers; even though peak HP will be a little less.
Cam duration between 265-270 degrees at 0.050" tappet lift. Valve lift with 1.5 rockers 0.620"-0.660".
With the TF intake port exit slightly improved, I would expect peak power of my picks 6000-6200 rpm. Low end (2500-3500 rpm) torque will be better with the smaller headers so you won't have to down shift to the torque peak around 4900 rpm.
Even with 11.0 CR, a 260-265 cam with 0.640" lift can make the 700 hp around 6000 rpm, torque peak around 4600 rpm. But if it only make 695 don't be mad.