Dual single resevoir master cylinders?

[ChryslerKid]

At one of the shops on my route today I see a cool 66' dodge truck. I go to check it out and notice it has two side by side single master cylinders with a hard vacuum line off the top of the intake feeding a brake booster under the dash. Is there any real advantage to doing it this way? Im guessing this was the same engineer that implemented the left hand thread lugnuts.

 

[Fran Blacker]

Picture worth a thousand words but in this case more questions. Pictures under dash? Are both for brakes or is one for a clutch arrangements? Needed more room in engine compartments for PB booster?

 

[ChryslerKid]

I didnt take a picture under the dash but I was talking to the owner of the shop(one of the best mechanics I know). No clutch it was an automatic 4x4

 

[ChryslerKid]

Also i dont think ive ever seen under the valve covers of a poly 318. Straight exhaust rockers with diagonal intake rockers... just odd

 

[69 Sleeper Bee]

Well 2 single pot master cylinders is definitely better than 1.
Where the heck did they find headers to fit a 4x4 poly

 

[khryslerkid]

Also i dont think ive ever seen under the valve covers of a poly 318.

Polyspherical chamber like a hemi head but one rocker shaft.

 

[khryslerkid]

The one master cylinder is for the clutch. The leaver you saw was probably a three on the tree. The automatic trans had a shifter on the dash.

Three on the tree...

Automatic...

 

[ChryslerKid]

It only had two pedals with a wide brake pedal. Maybe he converted it to auto and left the clutch master.

 

[Dave6T4]

I once had a 1966 Dodge pick-up. One master cylinder is hydraulic clutch.

 

[Big Bad Dad]

Mid sixties Dodge trucks did have a master cylinder for the hydraulic clutch. I had a 65 model D100 with a slant 6 that had that setup. I bet that truck has been changed, and the old cylinder left in place on the firewall. (Probably to mess with people that ask the question.. LOL)