Best insurance you can get. I have 1 (Moroso) and will swear by it. I have it operable to turn on just before start up to get oil flowing then it recharges and on standby ...just incase.
Not bragging but I have just under $36,000 (Canadian eh) into this monster with all the gadgets and don't want to do it again.
God, it is time to build a 5 litre!
First way is with the manual valve that comes with the accum....before you shut the engine off, close the valve and trap the oil in the accum. before you start it the next time, open the valve to pre-lube the engine.
Second. Change the manual valve to an electrial 12vdc solenoid valve and mount a switch inside the car. The solemoid would have to be rated for continuous duty.
I wouldn't run a high dollar motor without one now days.