Brake push rod length

[VitaminCRR]

So I put a Dr. Diff disc conversion on my 69 Roadrunner along with a new master cylinder. The push rod is too short so the pedal is low. I'm going to put in an adjustable push rod in and I'm wondering what length it should be before I put it in. Or do I just guess and take it out and put it back in repeatedly until the pedal is where I want it? I've seen guys cut and weld them and also seen them cut and threaded for an adjuster. Where should I start on length?

 

[bc3j]

FWIW I used my stock pushrod on my E body. It lowered the pedal height using an aluminum master with the adapter plate, but it’s not detrimental to any braking action for me.

 

[yella71]

Disconnect the push rod and move the peddle to where you want it. Then measure that amount and get or fab a push rod with the added length.