A 1-pint Marvel Mystery Oil can with a piece of copper tubing soldered into the bottom for a piece of rubber hose would make an excellent reservoir. Just poke a tiny vent hole into the screw top with an ice pick or a [censored] punch. Solder a piece of sheet metal onto the back of the can and attach it to the firewall with a couple of sheet metal screws. Just be sure to wash the can out several times with alcohol to remove any petroleum residue.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!