Engine stand bolts

The guy sent me this, he has it on his stand now. I assume he meant 3/8-16?
Roughly what lengths might I need? I'll get an assortment.

Bolt Size and Tightening Information – 170, 198 & 225 Slant Six Engine
Fastener Location Quanity Thread Size, Torque (ft. lbs) Wrench Size
Engine to Trans. Bellhousing (4) 3/6-16, 30 9/16
Engine to Trans. Bell, Bottom (2) 7/16-14, 35 5/8
The length will depend on your engine stand.