Boosters!

To start things off, following are links to supposed fits and some possible vendors etc...

http://shop.advanceautoparts.com/we...rabber&utm_campaign=value3&utm_content=value4

http://shop.advanceautoparts.com/we...rabber&utm_campaign=value3&utm_content=value4

http://www.performanceonline.com/19...-Plymouth-Car-Power-Chrome-Brake-Booster-Kit/

http://www.ebay.com/itm/mopar-A-B-E...iter_Display:3.7L&hash=item4d060438c3&vxp=mtr

http://www.ebay.com/sch/i.html?_odk...rt+Custom+3.7L+booster&_sacat=33559&_from=R40

http://chucker54.stores.yahoo.net/ststbrmacyan.html

http://www.oreillyauto.com/site/c/d...ck=Search_01305_1088502_-1&pt=01305&ppt=C0066

http://www.rockauto.com/dbphp/mak,D...29,Brake%2FWheel+Hub,1884,Power+Brake+Booster

http://www.summitracing.com/parts/aaz-50-6206

http://www.powerbrakes.com/index.html