Proportioning valve

And what rear brakes?

What other changes?

Actually probably don't want answer this any more directly than I've indicated above.
If its stock, then following the factory setup will be the best bolt in all 'round performance.
The one thing that won't be quite the same is the lining materials (unless you buy old stock and that's got pros and cons). So that's one variable you'll still have to experiment a bit with.

For not quite stock, or specialized performance use (such as high speed track or circle racing on pavement or loose ) then it may be desireable to have an adjustable proportioning valve. Also another tuning variable that I mentioned earlier is very slightly smaller (or sometimes larger) wheel cylinders.