To be honest, I would just go with a stock rebuild. Unless you have a radical motor, changing the jet size won't give you any noticeable power. There are all kinds of little tricks to mess with but a stock 600 cfm carb with that 289 should be plenty. The MSD coil shouldn't burn up anything. I ran an accel super coil with my old points distributor before my msd and it worked fine.
You may get a different opinion about the carb as there is always arguments about carb size and tuning but a fresh rebuild will probably do wonders alone without trying to trick it out or anything. Just my $.02
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1969 fast back; yellow; weld wheels; 302 roller with GT-40 heads; 3:55 gears; 5spd T-5; MSD 6AL; E-303; flows; Hedman headers; Holley 600;
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