Mallory ignition module blues

[ghostpedler]

Went to start the 70' Suburban last night for it's weekly run and it started, idled for about three minutes then died. Found no spark at the plugs. Msd distributor installed as an upgrade. Suspect module. Local dealer says one week and ONE HUNDRED$ for p/n 70-10001 USI 0126 (Mallory). Is there a cross for this module? Have 18,000mi on distributor. Power at distributor good from ignition switch. Tried new spare coil first. Thanks for any input guys!