lsx header and ac engine mounts

[62chevy302]

I am gathering parts to install a lq4 into my 63-66 frame.
I would like to know which mounts I need to purchase so I can headers(probably Doug Thorley) and low mount ac compressor. I have searched and can not find anything.
I have factory engine stands and 73-87 stands that came on my crossmember.

neither are bolted up so I could use either just the same. I also don't have a trans crossmember to line up because im swapping to a nv3500 5 speed.

is their a mount that will work for both concerns and have firewall clearance?

thanks in advance