Exactly. Those pictured above are not built to 1970 trans-am rules.
There was an independent entry named Robinson in 1970 that drove an A-body Barracuda. The factory backed teams that year were all E-bodies and unfortunately had a lot to work out with both a new chassis and engine.
http://www.historictransam.com/results/1970.pdf
Not to mention the battle of egos going on while building these cars
