There were some differences in the spring but not really with the retainers....I got six of them done on the driver's side within 20 minutes....the springs came out really easy with the pry bar looking spring compressor...I installed them with the hand rotary type compressor...dropped the locks a couple of times and cussed as they hit the floor...will have to move the master cylinder tomorrow to get the ones off of cylinder 7...the other side I will have to drop the header...here goes a couple of pics to show you things...

Comp's double spring on the right and 440 Source's single spring on the left....



Both spring compressors shown by master cylinder....



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