Very early '70's had '69 style/size marker lights front and rear, the smaller front turn signals with matching valance, and the early dash. The emission equipment is '70 model year style, and the C-Pillar vents are plastic. I'm betting that is an early '70.
My '70 was equipped this way, I swapped in the later dash, the bumper mounted license plate light, and the early C-pillar vents.
IMHO the heat shield could be much smaller and discreet attached to the master cylinder. I can't see any support for the middle of the shield, vibration induced cracking could also be a problem.
Engine compartment and manifold look BOSS though
I totally understand what James is saying. I just finished extensive repairs on a car, I've had it for about 8 months. But right up front I told the guy (really good friend of mine) that I was going to be doing the work in my "spare time". He knows that I have three kids and run my own business, and he was suitably patient through the whole process. He was willing to wait because he was confident in my ability and because I was saving him thousands of dollars. Because he was patient, I really enjoyed the project instead of growing to hate it near the end.
Rare to find an owner who really understands what it takes to get something done. This ain't Overhaulin'