You shouldn't have a problem with the pulleys, although I'd recommend keeping the stock alternator pulley, that would keep the alternator from slowing down much, you could use the water pump and crank pulleys.
The oil pressure is fine, what it's doing is normal. When the oil is cold, the engine will have more pressure and when the engine warms, the oil thins and as long as the pressure doesn't drop below 8 psi, it's fine, especially since it comes back up when it's revved.
The oil pressure is fine, what it's doing is normal. When the oil is cold, the engine will have more pressure and when the engine warms, the oil thins and as long as the pressure doesn't drop below 8 psi, it's fine, especially since it comes back up when it's revved.
