Hmmm....
73Lemans...if Rowe did the work, didn't he know what your setup was?
Seems he would have taken in to account that the springs were to light for the cam and idle qualities and used heavier springs for delayed advance.
Not trying to bash the guy, just an observation.
1973 SD455 T/A
1979 S.E. T/A
http://community.webshots.com/album/16587603rOyvmFCiHs