I have all the parts for the front swap. What proportioning valve should i use cause i have rear drums ? I was thinking of using an adjustable one. But could i get away with using the stock one.

 

I wouldn't run the front 1LE brakes with rear drums. You're better off waiting and converting to 4-wheel disc, then getting a 1LE proportioning valve. I haven't a clue what type of valve to use with rear drums, but I'd say stay with the stock one...it's a 60% front, 40% rear bias, and since the front's are meaty, you're better off that way. 4 wheel discs are 50%-50%.

My $0.02.

 

I'm running front 1LE brakes with stock rear drums with no problems. Both still put out brake dust, and they worked fine on a road-race course with race pads up front. I used the stock proportioning valve and the braking still feels very balanced.

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Greg Westphal
'87 IROC 305TPI/A4