Nov 2004 /////what are the options for a dual M/C on a '65 Cruiser? It has to be a four bolt mount unit unlike the typical Lark setup///// ----------------------------- On the '64 Marshal I have here, I used a '71 MOPAR disc brake master cylinder. bolted right up / fits and works fine. ---------------------------- Mid 70's Mopar has the 4 bolt mount. Make sure to check the linkage between the M/C and the pedal!!! ---------------------------- 71 Cuda model brake MC --------------------------- Check April 2001 Turning Wheels, in the Co-operator section ========== ///////////Went to install the Mopar dual M/C on that disk brake '65 Cruiser and the "plunger" depth is a lot deeper (3/4" or so) in the Stude single M/C as compared to the Mopar unit. I'm considering drilling out the Mopar unit to an equivalent depth. I know that this has been done with other applications but this one?? Adjusting the throw on the booster is out because the threads are apparently jammed. The two times that I attempted to do so on Lark boosters, the end nut simply snapped off. What duz youse think??////////// ----------------------- If you do elect to drill the hole in the plunger deeper, please disassamble the M/C and make sure beforehand that you won't wind up drilling into a pre-existing hole, or otherwise weakening the plunger. Also, if you do this, bye-bye warranty on the M/C! And if someone else ever has to work on it, they are going to have a hard time finding a replacement M/C with the same plunger depth. Does the push rod come out of the booster? Maybe a little bench work on it is in order. If I were doing this job, I'd prefer to modify the push rod in the booster, rather than monkey with the M/C. ------------------------ We've done this before without any ill effects. Admittedly, not the best option. > And if someone else ever has to work on it, they are going to have a > hard time finding a replacement M/C with the same plunger depth. > > Does the push rod come out of the booster? Maybe a little bench work > on it is in order. > I have had 'em come out on other boosters but this is the Avanti style unit and it does not want to come out.. > If I were doing this job, I'd prefer to modify the push rod in the > booster, rather than monkey with the M/C. > That's all well and good but for that to happen, it cannot be in the booster if some heat is gonna be applied. -------------------------- I agree with Gord on this one. The rod on the booster should come out and I'd use relatively low heat (propane torch) to try to get it loose. On the Stude disc brake cars I have made the swap on, I used a '71 Mopar disc brake M/C and did not have any length issues. ----------------------------- This is a four bolt master cylinder and supposedly is for a '71 Mopar (Cuda I believe) and the difference between it and the stude unit is nearly an inch. I didn't make an exact comparison but is is substantial. The adjustment in the booster is seized and the plunger don't wanna come out of the booster for surgery... What M/C's did Avanti use in the 1970's for the Dunlop setup??? My haid hoits... -------------------------------- In that whole list, I don't recall what they used for '66-71 avanti's... JT -------------------------------