Right side pipe sits too low

[Mark IV]

The SPF factory supplies shims to use under the engine mount pedestal. If you need some I will send some at no cost.

The "Galaxie" mounts are for the FE, not a 351 Windsor. Often the mounts used by some installers are soft and allow too much engine "rocking" to occur. I suggest the polyurethane mounts available to limit the engine movement.

You can measure the clearance from the air cleaner top to the hood/hood scoop to determine how much the engine can be raised. If the amount of shim is excessive you can use a "wedge" spacer to raise or lower the sidepipe in the body opening.