440 conversion

Good morning. I have a 340 in my 72 Challenger and plan to install a 440 engine. Is there anything that I should know before I do all of this that would help me avoid pain and sorrow? What about the motor mounts? I plan to put a new Holley 650 CFM on it. I would think that should be enough. I will install a high performance cam to give it a little sound. What about the exhaust? I recently put new exhaust on the car before I got the 440.

Any advice would be appreciated. I am excited about...

440 conversion