Apologies if this has been discussed too much already, but a forum search didn't find much to answer my question. What is available for a 55-59 3800 trucks for either power brakes and/or dual circuit systems? I see a lot of power brake conversions available for 3100 trucks, but all appear to have a 1" master cylinder. I believe a 3800 has a 1.125 bore for master cylinder. Thanks for the help!
