valve spring height question

any one know if comp cams retainers # 744-16 is the same thickness as the stock BB retainers? i am hoping it is thinner so if i get them i can use the 911-16 springs then shim springs to correct height.

If this helps......

Just seconds ago I tried a factory retainer and lock and switched to the Comp 741-16 retainer and 627-16 (2-groove/4-groove) lock and gained .032" installed height.

Pause for thought.........is Chrysler a true 7 degree lock? Can you use Chrysler locks on Comp or Crane 7 degree retainers?