I'll use this one, http://www.maxbrake.com/
When I did my brake system I installed the 1/4" NPT fitting with a plug in it then later on when I buy the controller I'll switch the plug for the sending unit.

This type works much better than the inertia type.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-