Thanks 67Dart273 and matsucu06. I've been following this cause I plan on putting my 340 together myself. I did a 318 back in 1980 and I had it 180* out. I got it to run by going that way and the plug wires 180* also. Thanks, didn't mean to highjack.
No worries... This is my third 340 motor I've built, but still amazed at how much I don't know! Each build has had different challenges that bring new learning opportunities... Guys like 67Dart273 (And many others on this site) are a wealth of knowledge and information to learn new stuff!!