1966 Ford Mustang V8 Conversion Using 1968 Donor?

I have a 1966 factory straight 6 manual
using 1968 v8 donor all complete.

Is this a direct interchange for the main portion of the swap? Engine and trans, power steering, brake booster, and rear end?

Looks like I need to change the bottom crossmember as the 68 seem deeper and also the engine mount brackets.

Any tips or heads up appreaciated!
Added (1). Here is a list of what I have done.
Changed 4 to 5 lug disc with v8 spindles
changed rear end to 5 lug
all disc all around
Added (2). 1968 has a c4 transmission with a neutral safety switch, not sure how to connect with the 1966 ford mustang manual body as it never had the wiring for the switch.

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