Switching to Kelsey Hayes setup

snowmobiler7c said

Looks good i will be finally starting mine in the next couple days also. Keep us updated.

As far as the wheel cylinders go i checked autozone online and they note the same wheel cylinders on the rear of the car wether it is disc or drum setup up front. AS long as they are 10in brakes.

Vs29H1B----was your problem with factory 9in rear brakes????

Click to expand...

The factory 8.75" rear axle setup specified the 10" x 1.75" rear brakes.

The factory 8.75" rear was factory standard equipment on all factory 340 equipped cars until 1973 when Abodies moved to the LBP.

The factory specified the 10" x 1.75" rear brakes for 1971 and 1972 340 cars, that DID NOT have the K-H discs as standard factory equipment.

The 1970 factory Duster 340 and the Dart Swinger 340 came equipped from the factory with the K-H discs and the 8.75" rear with 10" x 1.75" rear brakes which also included the correct factory proportioning valve.

The correct rear brake wheel cylinder must be used with the K-H discs to ensure that brake pressure proportioning is applied properly within the system, otherwise it is tricky to keep the rear brakes from prematurely locking up. This has been a common problem for guys that did the K-H conversions.