Look at page 8 for installing the main bearing seal
Removed by request
To remove and install the upper rope type main bearing seal:
Sneaky Pete Oil Seal Remover / Installer Features: Removes & installs upper rear
main seals without dropping crankshaft. Includes everything needed
http://www.amazon.com/Sneaky-Pete-Seal-Remover-Installer/dp/B000X01ZJM
I used a similar product 1 time on a 235 chevy engine and it worked the 1 time I did it.