360+engine stand= what bolts?

Well I just bought an engine stand for my 360 that I plan to build.
The engine stand did not come with any bolts to mount the engine.
I have read around online that I will probably need 3/8-16 grade 8 bolts but no one post the lengths.

Anyone for sure what kind/size bolts I need to mount this engine?

Threading? Lengths?

Any help would be appreciated!

Also I now I can order the kits online like from summit or jegs. I am mainly looking to just go to the local hardware store to find some.