NEW YORK (AP).- A newly publicized will by an heiress to a Montana copper mining fortune leaves most of her $400 million estate to her family, while a will signed just weeks later left nothing to relatives. The childless Huguette Clark died in May at age 104 — a last breath of New York’s Gilded Age that produced the Rockefellers, Astors and Vanderbilts. Her relatives brought the new will to light on Monday: They filed court papers asking a Surrogate’s Court judge to involve them in proceedings about how her money was spent — and by whom — while she was alive. Clark’s relatives accuse her co-executors, attorney Wallace Bock and accountant Irving Kamsler, of plundering her fortune. The two were among the few who for years had access to the reclusive Clark in her Manhattan hospital room. Clark had left her 42-room Manhattan home — the largest