I wouldn’t worry about the overall dimensions personally. The quality of the spring itself is all I’d be concerned about.
The MP oval tracks have been around forever, and the AFCO’s that are made to oval track specs of varying spring rates have been around a long time too. They work just fine with standard hangers.
As you seem to know, the one thing I was going to ask but forgot until now is if there is actually a difference between left and right in ride height or pounds per inch spring rate etc…. On the oval track springs.
Ie: do I need to order two from the drivers side etc, as I would if I used SS springs to avoid A - excessive ride height, and B - uneven height from side to side.
Thanks in advance for your reply.