I just got my engine stand from Harbor - minus one wheel, any way. I need to purchase some bolts to hold the engine to the stand and need to know what thread and length.
I think 3/8 coarse. You will have to determine length based on the length of the spacer that goes against the block. 3 1/2 will be close. I suggest grade 8 just to be safe. Don't forget a heavy flat washer under the bolt head.