I sent my 6AL back to MSD about 15 years ago and it's been going strong since then and it was less than $50.00 with shipping.
I don't know how reliable they are anymore judging from some of the negative feedback I have read here and other sites.
Maybe give Rick a call or PM at Firecore for one of their new units.
Gus

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64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60