64-65 Hemi swap? Anyone do it with the stock K-Member?

You are concentrating on physically fitting the engine but don't forget the exhaust!
And steering shaft!
And removing most of the trans tunnel!

On 67 and newer swaps the steering shaft just barely clears the rear-most valve cover lower corner. That's after shortening the approx 2-1/4" tube that contains the lower bearing. A little grinding of the valve cover corner helps as does reducing the 1" diameter shaft. The column mounting holes can be elongated a little to shift everything outboard a little.
It could be a lot worse on the narrower A-body. It may require after market column and 2-3 u-joints street rod style.

I'm not trying to discourage you, just the opposite. I hope you move ahead with this.

Yes I have taken into account of the steering setup. My current build I have a EPAS setup with the power unit mounted under the dash and a 3/4 shaft from a rav4. Shifting this a bit would not be much of a issue as well as adding a few joints.
As for the trans tunnel the 545RFE isn't "that much" bigger than the 46RE that's fitted to my build now and I've moved the tunnel quite a bit, Hope I may only need a small amount of mod to make it fit. if its more of an issue I'll retain the 46re and just use a standalone controller for it.
yea... Exhaust manifold that's my hang up at the moment. As much as I hate the idea, the stock log manifolds my be my best bet. Cutting the ball flange mount and rewelding it on to get more of a downward angel might be the ticket or we say screw it a flip the manifolds and turbo the piss out of it could be fun.... lol :poke::eek: