Looking for a Stant/MOPAR radiator cap for my 73 Dart

Hi All,
First of all...thanks to Rbob and 71DodgeDemon340 for their responses. I talked to Mike at Stant yesterday and he said that the 10229 will work fine for the open and closed systems. Since it is a 13lb. cap, Stant rates it as being acceptable for any system in the 12-16lb. range. You get 3 degrees boilover protection for each lb. and so the 13lb. cap will give you a 254 degree boilover limit. I prefer having a little less pressure on my system given the age of our cars. Just wanted to give an update and maybe help someone else on FABO.
Thanks,
Greg