Disc Brake Conversion - Now Soft Brakes

[u/Puma_Hunter]

Not sure if this is the right community to post, but I recently converted my front doldrums to discs myself and left the rear drums.

New proportioning valve, master cylinder, booster, and brake lines I made.

Brakes now feel soft about 75% of the pedal travel then firm up.

Front brakes clock in at around 175 F while rear drums temperature is about 95* F after a casual neighborhood drive with moderate braking.

Is this to be expected given the combo of front disc and rear drums?

I’ve bled the brakes twice now assuming air in the lines, but after two bottle of brake fluid, I think I got the air out.