Power Booster...not sure what I need...

Back around 1974 I pulled the power booster & vacuum reservoir off of a 1965 273 Commando Barracuda. Swapped them straight over onto my 1964 Barracuda. Both cars were stock V8 cars. Mine had 9" drums all around & I'm not sure but I imagine the 65 had 10" drums. I just bolted the booster with its mounting bracket up to my master cylinder (seems like there was a different pushrod setup) & fastened the reservoir to the fender. Don't know if they worked right or not but the brakes sucked! I pulled the stuff back off & stayed with my much better (believe it or not) manual 9" brakes.

Now I'm swapping to front discs to go with the long ago swapped on 10" rear drums.