Sounds like a neutral safety switch symptom, but if you get no dash lights I would suspect the starter switch since it seems no power is going through it to energize the dash lamps.

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Gary


1973 450SL
1999 Silverado 4X4 Ext Cab
1999 Mercury Sable
1972 450SL Parts car

Previously owned keepers:
1967 MGCGT - 3L-6
1972 Mustang Fastback - 351C

Current Cylinder Index: 37