You don’t need An external coil with the HEI. This is the one I bought A-Team Performance - Complete HEI Distributor 65,000 Coil Auto Parts Replacement - Compatible with SBF Small Block Ford 260 289 302 5.0 One Wire Installation Red Cap https://www.amazon.com/dp/B01LY1J2OU/ref=cm_sw_r_cp_api_glt_i_Z08ZGST574Y0QM0Z6JPB?_encoding=UTF8&psc=1
Cheap buffer on Amazon, simple gray abrasive wheel.
This is first pass. Next I’ll start buffing.
Uxcell a15122800ux0618 150mm 25mm... https://www.amazon.com/dp/B01DKABIOI?ref=ppx_pop_mob_ap_share
POWERTEC BF600 Heavy Duty Bench... https://www.amazon.com/dp/B01BW8UOHC?ref=ppx_pop_mob_ap_share