ronsway,
Just a note that you should start a new post in the
Driveline forum to discuss your question "What about transmission, drive line and rear end conversions?".
You can refer folks back to this conversation so they know you are considering a 235 swap to go along with upgrading/converting the rest of the driveline to match.
Doing that will help folks provide better on-topic answers and suggestions to help you manage your way through this.
Dan