The grey engine is my original replacement engine that came in the core truck and I fitted it with the adaptor plate and early pump.
The orange and later hammered-grey engine is my 60 tricked out engine, also with the adaptor plate and early pump that I am currently running in my 54 truck.
I fabricated my own pass side alternator mount and the P/S pump will run off the 2nd groove on the compressor pulley. This configuration keeps the accessories low on the engine and basically out of the line-of-sight.
The information on the adaptor plate is in my album...you will need to click on "full size" to be able to read all the installation instructions and ordering information.
If you note on the adaptor plate mounted pump, it is located higher on the face of the block....this additional height helps with centering the fan on the radiator and adding a larger aftermarket fan.
The adaptor plate early pump lines up perfectly with the harmonic balancer. The plate is 1/8" thick.
Dave
