Sailboat stands for a hunter 30

[Guidera48]

I need to change an engine in a 1980 Hunter 30. I will put it on 2 6x6 wood cribing. The boat has a 4.6 ft draft. I need to know what size boat stands to buy. They come in about 6 different heights. Does any one know which size is the more appropriate?? I could also build a temporary craddle in wood but have not found any pictures showing one. I know, i know, build a steel craddle but I a Home builder and have lot's of free lumber. It would be used for about 2 weeks.
Thanks for your input.