Performance Suspension Technology (PST) has complete "kits", including your little Dodge. They have them ion original "rubber type" or poly-eurethane. If ride comfort and keeping all the bolts tight is more important than diving into a corner, stick with the rubber.
Not to rain on a parade, but if you found a "6-Pack" intake for a small block Dodge, it's for a 340. No other small Dodge came with it. It will "fit" the 273, but WAY TOO MUCH for it. I would recommend Edelbrock Performer Air Gap (NOT RPM) and a 600 Holley vacuum secondary, 4150 model. 273 is a little engine (albeit one of the better "little" ones), and MUST be tuned accordingly. Otherwise, it'll be a pig...
Jim