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I just purchashed a brake m/c booster for my 41 chevy. I plan to mount it to the frame rail. I was wondering if I should put the pedal where the original brake pedal was located or try to center the pedal. If I mount the m/c to the frame with the existing bracket the pedal lines up where the orig. clutch pedal was and it looks like the steering column will be in the way. Maybe if I move the steering column up on the toe board it will allow more room for the brake pedal. Any ideas would be appreciated, let me know what you guys think. thanks James. I have to remind myself what my buddy told me "if it were easy everybody would be doing it"

Take a look at web sites for ECI or Kugel and look at the 90 degree type system that puts the MC sideways under the dash. You could make a simlar system under the floor but in reverse design.

You could fabricate a 90 degree system from your stock bracket (without booster). With the booster mounted to the frame with the MC towards the rear you would need to make two 90 degree cranks.

Or you could mount the booster with the MC forward and make a u-turn crank like a early Camaro cluth linkage. That would have the rod from the pedal on the upwards arm and the downward arm would feed in to the booster near the frame.

Be creative! I'm headed that way on my 46 but I won't get there for a few more months. At this point I don't plan to use a booster. I'm thinking that the second crank will have a longer arm on the input side . That will bump up my stock 5:1 pedal ratio up more like 7:1 after the second 90 in to the MC.

Clear as mud, right?

one of my friends used a bellcrank and mounted the booster and master to the frame like on the ad model trucks

That is about the most confusing thing I've read in a while. I will be adding a dual MC with booster in a month or two and thought all I had to do was buy one of those that would bolt on the frame in the original location, the one that comes with a petal. It was that or one that uses the original petal.
Now I don't know what to do.

big chevy 3600 if your truck is a 1951 not a 1941 like james yours will be ez just make a plate with holes so your booster will fit it and weld it to the frame. put a longer rod from your stock peddle to the booster and weld a brace from your frame to the bracket.

I used a kit from Fat Mans for a Mustang II master cylinder on my '49. It bolts right to the frame where the original was an uses the original pedal. Just one thing. The rod going from the pedal to the MC is adjustable. You will probably have to adjust it a little to get proper braking action. Voice of experience!

Thanks for the suggestions. Looks like I am going to have to fab up a bracket to make this work, I just wonder how much distance I should have from the back of the pedal to the toe board. James

James...I put a mc & booster in my '42...my application is a little different because I also switched to a T5 tranny. Consequently I had to mount a different brake & clutch pedal set-up (from another truck) since the original pedals mounted to the stock transmission case. However, I did mount the mc & booster (7") to the frame rail...key considerations were make sure the brake rod from the pedal is a straight shot and that the mc & booster are supported (braced) on the frame rail so they don't torque when you apply the brake.

Thanks for the help Steve, I was thinking a picture is worth a thousand word. Do you have any pics. James

James..I'll see if I can get some pics this PM.

I called Classic Parts yesterday and checked with them to see if the MC disc/disc with booster would mount on my frame (51 3/4 ton) using my original petal. He refered me to Classic Preformance Products who makes the MC and from where Classic Parts drop ships. I called them and they said yes it would work. I call Classic Parts back and ordered the MC. Fron what CPP said the bracket bolts on and I use the orig petal.
I will be running a 700R4 tranny so I guess I'll just cut off the clutch petal and fill in the hole in the floor.
Any comments???

Sounds like you are on the right track!

You can cut the clutch pedal arms off, but you need to leave the round part that mounts on the axle where the brake pedal mounts so that the brake pedal will be where it needs to be. You could also just unbolt the pedal arm and fill the hole in the firewall, then if you ever wanted to restore it to stock or sell the pedal assembly you could. If you are sure you don't ever want to do that, there are dual master/booster kits which include the pedal arm that might work better than the stock pedal.

NM51 all the booster kits with built in petals I've seen would have the brake petal over on the left about where the clutch petal was. I don't think I could ever get use to it being over there. I wonder if anyone has had a problem with the power booster kit that uses the original brake petal.

I'm not sure if I can help ,but When I installed my m/c and kept my original brake and clutch pedals I could not use thr booster on my '48 1/2t frame mount , so I spoke with the folks at CCP and said the only way to use a booster is to mount it on the firewall. Good luck! -Mike

Mike:
I spoke with Classic Performance Parts who manufactures a MC with booster kit. They assured me the kit they made would bolt to the frame and miss the tranny. I bought that MC from Classic Parts (Chevy Duty). They get that MC from CPP. It should be here in a week or so. I'll know then if it fits or not.

On installing a master cylinder/booster to a 41-46 chevy i just finished installing one on my 46 with 350/350 i mounted it on the fire wall. hung the pedal to the left of the steering,ive looked and called vendors and nobody carrys a bolt in mc/booster for 41-46 trucks.most of the rod shops around sac calif and guy named tim who ive emailed on this same subject.said to just mount it to the fire wall.so,if you are looking for a cool guy to help with this set check out the gallery in stovebolt pictures and take a look at his truck,and email him he istalled his master/booster under the floor,anyways good luck

Call Buffalo Ent. he would be the only one on the planet to figure out the best way to mount master cyl/booster for the 41-46 pickups. Ph. 360 652-7684