Sherman, I've done a little research on just that swap (292 into 49-54 chevy). I believe that http://www.chassisengineeringinc.com/ has everything you need. Order engine mount #cs-1419 but ask for 2 left side mounts. Order frame mount #as-0204. They also have trans mounts for whatever transmission you care to use. Both frame and engine mounts are quite affordable, good quality product, and will save you a ton time.
Hope this helps,
Steve O. inliner #1623