Set/move engine down and/or back.

[64Chevelle]

Hi,

I'm trying to set my engine back and down as much as possible.

What is the recommended minimum distance between the oil pan and k-member? Poly motor mounts

Min. space between transmission and trans tunnel? Poly trans mount also.

Anything else I need to consider? Any recommendations and/or best practises?

Don't want to regret doing this in the future

Thanks in advance for any help and useful info!