left pull when braking

My 48 chevy with disk brakes all around started to pull to the left when braking. I have changed both front calipers and front brake hoses.
My front end is tight and tire pressure same on tires. My front clip is a 81 firebird. What's Up ?????

 

Alignment? Switch the front tire side to side. Might have a tread breaking loose. Radial tires..

 

could be a issue with the rear calipers and or pads.... been their done that

 

Thanks

 

If you or anyone you know has a in-fared thermometer, check the temperature of each brake and compare side to side(of coarse after making several stops) If it is pulling left I would suspect the brake on the right will be cooler.

 

Was it braking straight before now? Is the front line run up to the left front then on to the right front (I think that's the way they were stock). Do you have RPV's in the line?