Based on what I copied from the MS Website a couple of years ago;  "Brake Pedals Identification and Interchangeability FAQ", the brake pedals for 65-66 manual and power brakes are the same. 
I'm not sure if this info still exists, but if you PM your email address, I'll forward it to you. 

 

Here is how

You need a manual, unmodified brake pedal for 65-66.  67 will work, too.
The brake pedal will bolt right into the pedal support bearings.

On the firewall, your master cylinder will bolt up after redrilling the pedal support for the two attaching holes.  You will want to weld a couple of 3/8” nuts to the support to accept those bolts holding the master cylinder.

Since the firewall center hole is larger for the booster, you may want to make a thin sheet metal filler panel to go between the master cylinder and the firewall, just to block airflow.

Clutch pedal function will not be impacted.

I would happily swap you your pedal support and brake pedal for a stock one if you are hell-bent on undoing your power brakes.  I want to add them to my 65 convertible so it has the best power brake system possible.

"Anybody see this huge ELEPHANT standing in the middle of the room.........."
(I'll do it...)
So John....why ya swapping out power brakes for manuals?!
6sal6

Oh, I didn't realize that was an elephant.  I suppose I should have guessed from the ears, trunk, and pink toenails (so it could hide in cherry trees).

My brake master cylinder just broke.  Since these cars are simple (and the power brake isn't really necessary if the other elements of the system are properly functioning), I'm considering simplifying and removing another failure point by ditching the booster. 

As for the six, my car was originally a six, converted (not all that well) by a previous owner to a V8.  So why not change some of it back to something closer to original?  Just because most everyone yanks out I6 engines and replaces them with V8s doesn't mean I have to.

Putting the 250 in was a challenge.  I learned a lot and had a lot of fun finding and fabbing up stuff to make it work.  I suppose that if it was easy, everyone would be doing it.   :-)

Last edited by John Ha (11/13/2024 7:45 AM)

Bullet Bob wrote:

John, you should have gone with a 200 since everyone is throwing them out. 
BB

I did - mostly - the 250 is just a stroked 200 (so I have a 125% 200 ).

I thought about the 200 but wanted the extra low-end torque and the ease of bolting it to my existing drivetrain without having to buy an adapter.  Of course I still had, and solved, issues with engine mounting, accessories, throttle linkage, exhaust, ... 

The fuel economy so far has been really good (24 on my mixed town-country driving) and I'm happy with the overall performance.  It drives well in town and feels comfortable at 80 on the freeway

Perhaps best of all, it's different (not bashing anyone - just expressing personal opinion/experience ... as 6sally6 sez, "Get busy Liv'in ...") - not the same as all those V8-swapped cars, and not the same as the few remaining stock I6 cars.  I guess I'm just a contrarian at heart.

John Ha wrote:

  I guess I'm just a contrarian at heart.

I've read in several places that straight six guys at car shows get a lot of love from attendees. 

On the contrarian thing, I always struggle with the pronunciation. Usually say "CON trair ee uhn" even that's not the correct way. The first syllable is a doozie.