I use ASC magneto condensers/capacitors on my HC builds. These are what Bubba will supply you, though you can also purchase them from various magneto builders. There are two different ratings --> .36 uF and .28 uF.
Either would probably work for your needs - though the smaller ones are quite a bit cheaper (if cost is an issue). If Bubba can supply you with two of the .36 uF ones for $64, that is a cheap price.
https://www.rbssuperchargers.com/Pro...er--2500-0093M
https://www.rbssuperchargers.com/Pro...er--2500-0093N