Can't burnout:(
Timing doesnt sound so retarded as to stop it patching out....14 inital is probably too much - unless you've limited your mechanical advance?
1/ Check to make sure you are getting all 4BBLs at WOT
2/ Check your compression
3/ Check your A/F at WOT (around 12.5 is good)
It still worries me that you reckon you have 21 in the dissy - remember, a recurve limits "how much" as well as "how quickly" your timing comes in.
Most factory SB dists are either 13 or 15 in the plate (see link below -it talks about 30 deg mechanical from the factory! )
- so thats 26 or 30 mech total - unless your dissy has had the mech. advance "limited", if you run any more than 10 initial, you're risking detonation under WOT.
http://www.moparmusclemagazine.com/techarticles/engine/mopp_0301_mopar_electronic_ignition_system/index.html