ok I found a listing for what looks like the same cradle as the greg smith one that says it will work with a inline 6

http://allstarperformance.com/product.htm?prod=668

Universal cradle may be used on in-line 4, 6, and 8 cylinder engines as well as older V8's. Adjustable 9" risers are positioned under oil pan rails, then 8' x 1" ratcheting strap is used to secure the engine to the cradle. Remove the risers and the cradle may be used for transmissions, wheels, tires, etc. Heavy duty, 3" swiveling casters move easily over garage and shop floors.

I may go with this as it seems quicker,and easier than trying to bolt up an engine stand maybe safer as the engine is down low and can\t be tipped like it could on the "T" base engine stand I have

Peter