Fred, if you are using the original crank pulley for the high mounted fan there is no way that I know of to add a crank pulley groove.
The 54 and 55 trucks are a real problem.
The only way I know of is to switch to a 56-later style water pump and crank damper then you can add pulleys to the crank damper.
You will also need a 56-64 truck pump pulley and fan.
if you have a fan shroud it probably won't fit with the fan mounted directly mounted on the water pump. You will need a 56 truck shroud if you want to use one.
http://ford-y-block.com 20 miles east of San Diego, 20 miles north of Mexico