Ford Flathead Knowledge to the courtesy phone please.

1950 Ford V 8 (flat head)  had grown to 239 cu.in.  Had a 6.6 CR, for 100 HP at 3600 rpm.

As mentioned , fuel had effect on CR.    Later on, some still existing flat heads , not Ford ,had hit 8.0 for high  altitude heads.

I dont see why this cant be made to work just fine without changing anything major. If it's not making vacuum with a stockish  cam something is wrong with it. Every booster is designed to work with its own internal volume. You shouldn't need to add to that unless someone is doing repeated brake applications in a fairly short time. If the engine legitimately can't make good intake vacuum you can add a vacuum pump. It's gonna work out fine as long as it's done correctly. 

Vacuum reservoirs are a thing.  Basically a vessel with a check valve to keep the negative pressure intact and an outlet to whatever device needed vacuum to operate.   

School bus's stop sign work off that vacuum. It works off a diaphragm that gets sucked in, causing the sign to pivot on a hinge.   Or at least they used to when I did a lot of work on school buses.    Engine vacuum from the reservoir evacuated it, same as power brakes.

I do remember delivering a school bus one time, a long drive, so I had it floored for several hours. Engine vacuum gauge was reading zero at WOT.   Top speed was 70mph.   All of a sudden all kinds of alarms were going off and warning lights that the vacuum tank was no longer charged.    I took my foot off the accelerator, vacuum gauge went to -15 or so,  and within maybe 5 seconds everything was copacetic again.    

This thread needs more hot rod stuff.

It's a girl my lord
with a flathead ford.

In reply to jharry3 :

There is a vacuum reservoir to go with the vacuum pump. I had thought about using it alone without the pump or just getting a bigger booster since space is not an obstacle. I think.

Can you convert a vacuum pump from a diesel truck to power the brakes?  That would give you all the vacuum you need.