I need to replace the MC on my CJ. It does not have power brakes. I have been searching around and I have found some places say to use a MC of 1968 Vette with a 1 1/8th bore. Some people have made it sound like this is a direct bolt on replacement. OThers have said that the push rod needs to be extended and some have said removing or altering the proportioning valve needs to be done. Has anyone on this board done this swap. IS it direct bolt on? IS it really worth it since it appears they are both about $30