BBC vs SBC engine stands and mounts?

[myyamr7]

I was searching for some engine stands for the big block I plan to put in my truck over the winter and noticed some vendors only have the right side reproduction, and no listing for a left?
First question is, is the left and right the same stand?
Second question, what is the actual difference with the small block vs big block engine stands? I know in 73 and up, the same mounts worked for both small block and big block without any modifications...so I'm almost certain the small block mounts will at least bolt in and have the same angle? Is there another reason why the SMB stands won't work? Mine is 1971 with the pads, not clamshells.

Thanks