i have a 1972 lemans wit a big block 455 and t 400..i jus recently wrecked it(thank god im alive) and i removed the motor and engine..my question is how much of a hassle would it be to put my big block 455 into a 1972 el camino shell?  

Assuming you still have the Lemans, it should be as easy as unbolting all the parts you need and bolting them into the Camino. The front half of the frame is virtually identical. You will have to reroute wiring and fuel lines to fit and use all the Pontiac accessories and brackets, but it will fit.
Steve