The aluminum jack is the one I was wondering about - I've used several different steel jacks, and most worked ok - some more steady than others. The aluminum jack at HF I saw seemed liked it would be pretty steady, AND I like the low weight of the aluminum - I have to store it in the back of the pickup so lifting the aluminum jack would be less stress on an old man like me.
I was a little concerned about the 5" clearance also.
Thanks for all the responses - AND you folks that were able to buy the aluminum jack for $50 sure got a good deal - what did you have to pay at Sam's for the same aluminum jack?
Ken H>