66 Dart GT HT Whatsitgonnabe?

360DartGT66 said
I just put my wire wheel to it and pulled the filler cap rubber gasket out which is actually in surprisingly good shape.

The cap has text on it and after reading a rather lengthy forum post I'm thinking it may be from '71 if the date code 221 means week 22 of year (7)1.

No idea if I'm correct and - frankly - not really concerned either.

With your info, Don, I think I'll try this without brake booster and see how I feel about it. If I'm not satisfied with the brakes, I'll get a VW master cylinder for a model with big brakes, like a Gofl GTI or a Passat.

Make sure its going to port enough fluid for your calipers if going the VW route otherwise you will have soft brakes and not enough fluid pressure.

Check bore diameters on the VW master cylinders similar to stock bendix is optimal, bigger is a bit better but will reward you with touchy brakes.

If all you can find is 4 wheel disc VW masters, make sure the piston bore for the front wheels is close to what your current one is,

the rear wheel circuit of a 4 wheel disc master will want to port more fluid to the rear than drum brakes will need making it want to lock up rear brakes first. This is bad. You can use an adjustable valve in the rear brake circuit to dial down rear pressure so you can use a 4 wheel disc master with your disc drum combination.

Hope this helps
Matt