360 magnum swap in 68 barracuda

It's easy to keep the Magnum serpentine setup too. I just grabbed a power steering bracket from a van and ran it with the van belt. The van setup moves the power steering pump below the factory battery tray.
If you're not running AC, Dorman makes an idler pulley that takes the place of the AC compressor so you don't have to hunt for the non-AC alternator bracket.

I like having the automatic belt tensioner and late model parts availability like coils and water pumps. Sad to say, I've had a hard time getting those *in stock* for old cars.

I've never understood why they made a different alternator bracket for non-AC setups. It barely moves the alternator at all but it is damn near impossible to delete the AC without it if you don't have the aftermarket idler. You can re route the belt but that results in piss poor belt wrap.

And it seems like Chrysler made about five Magnum engines total with factory AC delete. I even called salvage yards in Alaska trying to find AC delete trucks and couldn't find any. I guess they needed AC for defrost in Alaska but damn, it must've been a VERY rare option. Maybe Hawaii?
The non-AC alternator bracket does not move the alternator at all. It has the mounting point for the idler pulley raised so the belt will clear the water pump pulley when used with van power steering bracket.

The full size pickup and Dakota power steering bracket mounts the pump higher. You can run a for-AC alternator bracket with a pickup power steering bracket, no AC compressor, and use the non-AC belt routing. It will clear the water pump. But in a A-body the truck power steering pump hits the battery tray. If the battery is in the trunk this is not a problem.