$5 ld4b

The LD4B is an excellent intake. Think of it as a small runner Performer RPM. This intake will support 300+ hp and deliver excellent street manners. The only possible (minor) drawback is the lack of coil bracket bosses (move coil to fender). Assuming it is in usable condition the going rate is 20-30 times what you paid.

Since it sounds like your 273 is tired and in need of a rebuild, might I suggest you review this thread for ideas... http://www.forabodiesonly.com/mopar/showthread.php?t=94343