Swapping 360's

In my 64 Signet I have an LA 360 and will be putting in a 360 Magnum. I want to know if the serpentine belt system will fit in early A without problems.

The reason is, it's got a Vortec suoercharger and the engine is currently in a Dodge Dakota. I will be using the engine and trans, computer etc..

Thanks for everything..