I have a 89 trans am. Dop i install the line lock before or after the proportioning valve???

Phil

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1986 Grand National
Big fuel pump w/ hot wire kit
30lb injectors
Custom Street Chip
Underdrive Pulley, 160 therm, K&N,Mass air pipe
Adj Fuel Reg.
2800 Stall convertor
3" single exhaust
Air Bags
13.30@103.2 on the radials(2.004 60 ft) and 17#'s of boost

To pass an NHRA tech inspection the line lock should be past the pressure differential switch.

The outlet on the valve is 1 line to the rear brakes and 2 lines for the front. Remove and plug one of the front lines. The other line goes to the line lock and the 2 outlets on the line lock (might need to use a T-fitting) go to the front brakes.

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and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 481.6
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley