ok......after all the guys that said you should, done, could have,
did you think of blowing the brake lines out ,
you could have pickup sum #### when swaping around (dirt/grease ETC),
GIVE THAT A CRACK

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It wont be that, I ran the single sedan master with my 120y brakes and Im still running a larger single master with my R30 brakes.

if it was a drum front end did you change the master cyl to a twin one?

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I run 120y struts in my car, and I have the caliper at the back like they were originally. No hitting on anything, no problems. I do have a coupe though... is there any difference between coupe and sedan?

I did use the 120y flexible lines for mine.

Check to see that the caliper is not hitting the body work at full lock. If the caliper hits it might be pushing in the piston the pulls the outer pad inward. This would then require the piston be pumped back out before the brakes would work.

Definitely sounds like the flexible lines, when I used the 120y struts I used the 120y lines, the 1200 sedan lines would be too short as they are only flexible to the strut, then hard line from strut to wheel cylinder.

If you did use the 120y lines then I suggest unbolting the caliper and see if it wants to spin and untwist the flexible line if you get what I mean.

Did you put the struts in the correct way? The caliper should be at the front.

Did you use the 120y flexable lines - They may be different length to 1200 ones?

how could i fix this problem
cheers buddy

its a sedan, and when i go after i turn the steering, weird noisers are heard until i pump the brakes, it stays hard if i leave my foot on the petal

cheers buddy

Sedan or coupe?

If you get pressure and keep your foot on the pedal then turn full lock does the pedal move?

Sounds like your flexible lines might be twisting and causing it to block fluid.