The motor has an Edelbrock performer manifold, Edelbrock carb, and stock manifolds. I am assuming that the motor mounts are different than stock. It possibly has a cam upgrade. I am pleased that its a newer motor, it definitely makes option easier.
I found the adapter you were talking about. Pat Blais Transmissions has a webstore on ebay. Its T'Flite Patty's Shop Mart and the item is Mopar Torqueflite 904 ADAPTER 1960-67 T/C > 1968+ Crank
TFlite Pattys Shop Mart
Wow, thanks cudamark. That is great info. I think there is some vibration, where do you get the bushing and what size is it? I will talk to my mechanic about it.
I checked the casting number on my engine and its 4006730-318-3.
Apparently its a 1976-84 318.
How are these motors? It must be better than the stock 273. Any opinions?