Lean-Burn Dual P/U Distributors - Any Good?

the 2nd pickup is just to retard it. no adv springs I believe. would likely be good for a simple trigger. What I'd do is dial in your 70's OE dist subsytems in order: initial/total/spring/vac can (if used) with an HEI module and an E coil or a parts house 4 in ECU and a ballast and a coil/ballast combo that has at least 1.5 ohms total between the two. wiring a 4 terminal "dual" ballast together (adding a blue wire loop on both ends "OE has the blue loop on one end") will drop the ohms to 1.1 (on the last one I did) which is very close to what you'd need depending on your coil selection