Homemade wateriinjection questions....

[mtrain]

First let me say hello its good to be back to this site. Im running a carburated stroker Ford with high compression {11:1} naturally aspriated and plan to make a homemade WI system.
I have bought a micro switch which is installed on the carb and turns on as the secondaries open. This will turn on the water inj pump. I have done a search, but am unable to find what Im needing to know. I need to know what size pump and what size nozzles to run and also is there a pump I can use for example; someone said that a Ford f150 bosh fuel pump will work, but I dont know what year f150 or if this pump will be too much pressure for a carbed setup.
If anyone wants the micro switch it can be found a summitracing.com part number edl-72281 for the 4500 Holley carb.
thanks, Mike U.