Justin,

What year manifold do you have (what year and size engine do you have)? From 1954 onwards the horn was not attached to the intake manifold, so there there was no drilled mounting "boss" on the intake manifold.

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.