Swapping in a hemi 5.7

Has anyone done this swap yet? I would love to do this since TTI is making an engine mount kit plus headers for are a-bodies.
i will be using a 904 tranny or an overdrive tranny. im just trying to figure out if i need to add a vehicle speed sensor, i will be using a pullout motor instead of the crate motor.

Before it is dropped in i will also be adding a crane cam, and some other small mods, hoping for around 500hp.

any info would be great
thanks
steve