I'm sure you know this but you can get any Chevy Dist. and curve it to your liking. I'm using an MSD ready to run for now until I can find a nice 480.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B