Brake booster replacement

Cant speak for how to replace your booster. But in my opinion I'd ditch it, go w/a conversion to manual discs....but as far as your master cyl. goes. Yes, I'd replace it with a new aluminum unit. I bought one from Rick Ehrenberg based on an ad on Moparts. He will sell you one cheaper than a retailer and it's a nice improvement even on my manual drum Dart. Also, get his larger 7/8th inch rear wheel cylinders while your at it. Good cheap upgrade from stock... I got both the master cyl, and RWCI's for $111. Plus he gives you the adapter plate and pushrod retainer...all for cheaper than a mast. cyl is if you order from a retailer!

Check Moparts.com for sale ads or www.richardehrenberg.com for his ebay auction site.

Good luck!