Exactly How Do I Install Hooker Headers if Possible

Power brakes won't make any difference, but a power steering box is considerably larger than a manual one.
I second the vote for TTis, have put them in both a 75 Dart Sport 360 and a 70 Dart with a 360, both with 727 transmissions and power steering. Access to a hoist will be a huge help, and definitely get the smaller starter from a late model V8 Dakota, or Ram.