360 oil pan/gasket
Is that a one piece gasket?
You need the 4 piece gasket...
The two cork for the length on each side, then the rubber for each end. Each end takes a different rubber half circle seal.
Here's some info on oil pans. If you need a truck 360 pan, I may have one..
http://www.forabodiesonly.com/mopar/showthread.php?t=277430