wow memory lane....i did this same swap on a 71 dart that was a slant 6 ...and i got a 440 in.....it was first done with an auto and you can forget about using the column shift linkage....it will never clear....unless your going to use a low deck (383/440) .....i have made it work before on other cars with 383 and the cheapy B-body headers.....Kickdown linkage is an issue but i mixed and match kickdown pieces from sb and trucks until i found a combo that worked, but contrary to belief kickdown linkage changes with considerably with body type and year .....but it can be made to work......about 3 months after i built mine i converted to 4 speed and if you decide to go 4 speed the z-bar is going to be a problem child....i finally fabbed my own z-bar but it was not easy and took a couple trys to finally get it.