I ordered universal street rod motor mounts from Speedway. I trimmed these and welded them to the frame after figuring out exactly where I wanted the motor to sit. I used Energy Suspension mounts on the block of the motor. I have an LT-1, but this should work on most any small block Chevy V-8. These are the universal mounts that I ordered.
http://www.speedwaymotors.com/xq/aspx/path.2005/img.91018031_L/deptId.405/displayId.1905/qx/ProductLargeView.htm