Replace 273 with 318 poly and mechanical lifts

Hello, I maybe sell the parts of the Fury III this car have a 318 Poly with a 727 Torqueflite, this is a great engine, and i think if is compatible for replace the 273 of my barracuda, which problems can exist with the process???
Is compatible with the manual gearbox of my actually 273???


I too think performance my 273, I have a intake manifold edelbrock and a edelbrock 500cfm four barrels carb, I have a hookers headers and I like change the camshaft for a upgrade performance, my engine have the mechanical lifts, is possible a change of this by a hidraulic lifts????

Thanks! sorry again for my english... is horrible!!!