Swapping Brake Boosters

[Bruzilla]

Wanted to get some thoughts on this. I just bought a 73 Town & Country station wagon that I'm parting out, and it has the longer but narrower booster seen here:

My 74 Roadrunner was a 318 car and had the shorter/wider booster like this:

I'm putting a 440 into the Roadrunner, and since both cars are front disc/rear drum cars, I'm wondering if I would be better off swapping the booster from the wagon into the Roadrunner? Anyone know which is better?

 

[Yatzee]

There are a few factors that come into the equation when swapping boosters that should be considered. First and foremost is the stroke as it has to match the stroke of the master to ensure a proper volume of fluid to the system. Then there's the issue with size and a larger diaphragm means easier braking at the pedal providing the stroke distance is adequate. Volume of the canister usually dictates the amount of vacuum (volume) required and should be considered especially if the engine does not produce a lot. And of course there's the fit and mounting. On some big blocks it's preferable to have more room from the booster to the right valve cover. I see no reason why either booster won't work but you'll just have to really try both to see what braking performance you attain. Probably the most important factor is the match between the master and the booster and it would be preferable to keep this as close to OE as possible.