Lm7 swap help

[FoxJ12]

I have been sifting through a LOT of old threads and seem to be spinning my wheels here on what I need exactly.
70 c10
‘02 LM7
I want to use low mount a/c bracket for budget reasons. I have seen some which didn’t require a high mount.
I have heard that you can’t use the stock lm7 exhaust manifold. Is this true? Or can you slightly trim frame to fit?

Which aftermarket mounts will enable what I would like to do? These are the stock mount perches on my truck:
https://photos.app.goo.gl/u5d6RTZzjR5U9MXS8


Thanks.