Early model brake master issue?

[GunMetalGrey]

Working on swapping a 84 318i right now, and I planned on putting the IX booster in it, but the stock master has three brake lines running into it, where the one for the IX has two running to it. Is there anyway around this? I tried swapping master cylinders over, but they are far to different to allow that.
Is the only way to slot the booster over?

[bimmer630]

Three lines? Are you seeing the clutch fluid feed line coming off the reservoir?

[GunMetalGrey]

yep, the clutch line is seperate. The master cylinder has two spots for hardlines on the side, and has one underneath for another hardline

[frankie591]

the early master 'appears' to have more lines because the brake bias valve is attached by a bracket to the bottom side of the master. Just make sure to connect the rear brake line port on the ix master to the inlet port on the brake bias valve.

[M3PO]

I've been wondering about this too. My 84 325e has three hard lines at the master but the E32 master I am going to use only has two.

I thought I read that it's because there are two lines for the front and one for the rear. I thought I read that the front lines need to be tee-ed together?

[GunMetalGrey]

Yeah, two lines are for the front and one goes to the rear. The T is what we were thinking as well

[iceman]

I just made the lines work with the 3 port master cylinder and used an e21 booster. If I remember though, the late model master cyl. had an extra port on it where you could unbolt a plug. I am not sure if that port worked or not. I never tried.