Holley 4150 hp carburetors have NO choke tower. The main body has a radiused air entry instead. The carburetor identification number on the HP series are stamped into the THROTTLE SIDE of the main body.
Here we have gathered all of the currently available Holley hp carburetor factory specs. This will, at the very least, give you a baseline as to what your carb should have started out with.
All of these parts are available on our website as well as more Holley carburetor tuning parts.The carbs here are 4150hp mechanical secondary Carb numbers.