Do you want to replace the GI or the inserts? Those bulbs might work for the GI, although I'd recommend getting some warm white frosted bulbs from a pinball led company.

Stern/Bally games of that era need special bulbs or boards for the controlled lights. I think comet pinball has the bulbs, if not you'd need to get an alltek lamp board or adapter board.

Personally I'd recommend not changing the controlled lights, and getting a set of comet 2smd frosted warm white for the GI

Non ghosting doesn't apply to a stern. Only EMs and lamp matrix-based games.

It doesn't use a lamp matrix, which is the only type of lamp driving circuit that suffers from ghosting.

Without the extra board or special Leds, they will flicker and not stay on, but that's different from ghosting, which is caused by other lamps in the same row/column being on

https://www.cometpinball.com/products/1flux-bulbs are specifically designed to work with bally/stern games

Yeah, seigecraft is definitely the best option.

Well, besides just using incandescents in the inserts

How is it not correct?