I give up with brake bleeding

[Hydratech®]

"It's only about a 1 inch difference and the angle of the pushrod is hardly an issue."

The 1st gen F car factory vacuum booster is angled upward at whopping 17 degrees. Go crawl under the dash of a 1st gen F body and try to force the manual brake rod into the lower power brake pedal hole and see how that goes for you - it flat out isn't going to happen. If you somehow do actually manage to force it to happen, you are definitely going to get into linkage bind and extreme MC piston side loading leading to direct failure. Sooooo..... unless you angle your manual brake MC upwards by whatever means imaginable (to accommodate a 17 degree angle as bolted to the firewall), you are causing trouble talking about moving the brake pedal rod connection point from the upper manual brake pedal point to the lower power brake point in a manual brake equipped 1st gen F car.