a coil on plug is not a cheap venture on a 302.... probably the easiest method would be to add 5.0 EFI use the tps, maf, o2, crank and cam sensors off of a 4.6 or 5.4 and then run a control module for a 4.6/5.4 ..... that would be the cheapest and most effective way IMO other than that.... no one makes an out of the box coil on plug for a 302.... and HEI or duraspark II is pretty effiecient