A Stock ELECTRONIC Duraspark will suffice, but recurve it with lighter springs and lock it so it only gets 10* mechanical advancement. Then set your timing to around 28 degrees total advance at 3000rpm.
Leave points in the '60s where they belong. (Unless your worried about EMP or something)
I personally would go MSD Digital Box, Billet Dist, coil and wires without a second thought but boy.... $$$$ to do the conversions. ($700) Same setup as above with the lightest springs, 10* mech adv, and total timing to 30 degrees @ 3000rpm.
We chassis dynoed some EB offroad/tufftrucks with stocker 302's before our last race, and all of them liked the above timing best. The MSD equipped truck made 12 more HP than the duraspark and the torque curve was flatter. (169hp at the wheels versus 181hp)
I was never a fan of the original MSD 6AL boxes as it seemed every other one had issues... but the new Digital boxes have been 100% reliable in all our offroad trucks. And they take a BEATING in those. (heat/water/vibration/impacts)