360, LA360, or Magnum 360?

I don't know where you are comming up with $800 for a magnum intake, they are about the same price as an la one.
I picked up a M1 used on here for $175.00.
As far as the fuel pump hughes or mancini sells an adapter so you can use a la mechanical pump.
To put a magnum in your car you will need a car 360 oil pan.
You can re-use your la timing chain cover, water pump, pulleys etc.
Keep in mind that 360 magnum and la 360 are both balanced different so be careful.