pictures of pedal assemblies 340 vs. others

I am not an engineer by any means. What I can tell you is I have owned and worked on alot of a-bodies 67-76. What I have seen is there are definatetly a difference in the pedal assemblies. All 73 and up I dismantled have had a 5 1/4 pin spread they are hear. All a-bodies before 72 had Both 6 and 5 1/4. When I was stripping these cars I never noticed the difference. But I have several here that show there was a difference. The set I have here with the 6 inch spread I just took out of a 1971 duster 340.The other was out of a 71 225 six. I have plenty of 4 spd. set ups here complete and I know what I pulled them from they are all marked. They were not drivers that could have been repaired or replaced over the years. They were barn finds that were sitting since the 70's without the motors or they were smashed or rotted. The pedals shown came out of cars that just left here. The 340 car's last inspection was 1974. The 6 was bought out of a bone yard and I had to chop trees to get it out.( I needed the roof and 71 is on its own.) I also have a 71 340 4spd Demon here right now that has a 6 inch spread . What you all should do is get the December 2010 issue of Mopar Muscle Magazine. It will explain this better and you might get it. Some will use this info and some will try to prove it wrong as always. Otherwise I really don't care what anyone thinks.It was just a FYI . One thing I found on forums is that there will always be someone who says your wrong. If I were to say my car has round wheels . Somebody would say they have an original and their wheels came square. Look at the pictures they speak fo themselves. Read the artical in the magazines.