A little advice please

If you are going to really do this then look into a 12v 6TB set up from a 1994-1998 Dodge truck. Its all mechanical no electronics needed. Once you go with the 1998.5 and up you are getting into commonrail tech and the $$$ go up accordingly.

If you find a combo for a $1000 I would be surprised. The 12v motor is the easy set up to do. The manifold for the intake is low enough to clear the hood. You could run a non-intercooler set up for a while, but you want it eventually. The biggest pain will be build a radiator to hold enough coolant to keep the engine temps down. Plus the motors dry weight is in the neighborhood of 1000 lbs. Springs and shocks are the next engineering upgrade. Does the Ford steer in the front or rear of the spindles? I can't remember so clearance issues could be a prevailing concern.

The Galaxie is a full frame car and will support the torque no problem. The issue is height and steering clearance. The motor is very tall and holds 13 qts of oil. You can't skimp on cooling the beast. Then all this power need to go through a 47RE which needs a new torque convertor and rebuild just to handle the power. Suncoast or NADP could build you one. You are looking at 4-5 k for the trans alone. Sounds like fun, but it could get crazy.

A 385 series Ford motor is easily capable of 600hp on the cheap. Cheaper than most realize. The 460 can be a 514 easily and those heads flow pretty well. I would imagine the motor and trans are worth $400 to someone.

Good luck...