Well I checked out rock auto tranny mounts were 7 bucks a piece I ordered 4 of them for that price. Put 1 in my 65 Barracuda NO MORE SHAKE.So i did it to my 65 Valiant Convertible which shook real bad, Cured it. So I did my 64 wagon too. About 1/2 hour each Piece of cake. The only diferrence was...
I have several early a bodies the bodies wobble between 25 and30 mph on al all of them I have rebuilt the front ends even put in c body tie rod ends and disc brake on Couple but still wobble. The only thing in common is the ball and trunion front u joint. The are expensive if you can find them...
Thats a Factory Aussie Valiant ornament correct for that period. No such thing as Plymouth in Australia all there models were Valiant / wayfarer(ute) safari(wagon) Regal (sedan) etc.
I read about in mopar muscle years ago and have done it to all my abodies it was miraculos especially in my power steering cars. Much fatter tie rod ends same size posts just drop in to lower ball joints and idler/pitman. You'll need an alignment. Good time to replace all the rubber bushings...