I need to correct the rocker arm geometry on my BS heads. After reading some recent posts, Im gonna mill the pads on the heads flat. But, what hold downs do I need?

Thanks


72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.