jaymanaa
RIP 1961-2018
Low ESR is something to look for in a PS cap, and yes, do you have room for even a 1 Hy choke with a low ohm rating (think Dynaco 70). That said, a somewhat practical option for "some" factory built stuff is the motor run oil or wax cap. They are rated for ACV, so the lower rated (smaller) 330vac ones are good for 600vdc easy. I'm not a big lytic fan either.