I'm completing an Rx7 brake conversion, and I got my hands on an IS300 brake master cylinder, which lines up and fits the booster. I understand it has a 1 inch bore, like the s13 MC people run for their upgrade. My questions are...

- Does is matter if an ABS MC is fitted to a non ABS car?
- Does the IS300 MC come with build in proportioning, or would I need to run an external proportion value.