How do you align this modified vehicle?

Question:

I am restoring a 1967 Mustang and a common upgrade is to remove the front drum brakes and replace them with front disc brakes from a 1977 Granada.

My Mustang now has new upper and lower A frames for a 1967 Mustang, and front discs and calipers, front spindles, power brake booster and master along with the wheels off of the Granada. All seem to fit well.

The problem is what do I use for the front-end alignment measurement? The caster, camber and toe-in are all different for the Mustang and the Granada. I have even changed the front springs between the Mustang and Granada. Both fit but the Granada being a heavier car lifts the front of the Mustang too much. Any help you can give would be appreciated.

Answer:

Start off with the factory 1967 Mustang wheel alignment specifications and evaluate how the car steers, tracks and handles. If you have to make any adjustments from the stock specs it will most likely be to the caster.

If the caster is too negative, the steering will feel too light and you will experience noticeable wander from side to side when driving on a relatively flat roadway. Conversely, if the caster is too positive the steering will feel abnormally heavy and you will sometimes feel a jolt in the steering wheel when the car hits a bump.