I did mine from underneath, used 2 jacks on each side and dolly. I took off the head, for clearance, but I don't think I had to:
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Armando Diaz
85 911 Carrera - Track car
01 996 Carrera - For Sale http://forums.pelicanparts.com/showthread.php?s=&threadid=327823&highlight=996
87 944na - Old Daily Driver, now 944 CUP
03 Chevy Avalanche- Support Vehicle
70 Olds 442 W30 Conv- Gone but not forgotten
http://www.diazracing.com
adiaz@diazracing.com