At this point the Plan A concept was for an open roadster, slightly larger than the Fairlady Roadster, and powered by 2.0 liter in-line 4 cylinder. An altogether different and utterly more modern design than the cancelled A550X project of 1964.

Note:
Front grill opening much smaller
Body accent line at mid-level
Hidden Headlight treatment
Wheels/Tires much larger in proportion to body
Reminds me of the Lotus Elan