There are no issues using the unequal 4 link system.
Just because it does not look like the usual equal length it does not mean it does not work.
The unequal 4 link was designed for cars with limited provisions for installation of an equal 4 link with rules that limits modifications to the car such as Super Stock cars such as F-Bodies.
The system has been used and still offered by many including Ed Quay Race Cars.
If it was done by one of the Vic Custer guys, believe me, it is a good piece.
Vic Custer is one of the premier race car builders in Super Stock and Comp Eliminator.
Above is the Ed Quay unequal 4 link for F-Body applications.