Oldmanmopar said

There is a rubber piece the goes on that rod to hold it in the master. Make sure you get a new one or the rod can come out and you will lose your brakes. This is a very important part

This is the cheapest I found them besides someone that is selling cut hose. the listing I posted is Ebay get them there do not get the cut hose

Mopar Manual Brake Push-Rod Retainer, Bushing, Clip, Rubber Grommet | eBay

Jims brake parts has them but the cost is over $60 as seen below

Mopar Brake Parts | Jim's Auto Parts

NEW!
KQ-BB1A Master Cylinder Push Rod SEAL (Goes on the plunger rod that goes through the KQ-BB1 boot) Various Make & Model $ 64.95

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