linkage issues

Im trying to get my transmission all straightened out. Im having a problem with me linkage. First off i have a 68 barracuda with a 318/904 combo from a 68 cornet. My fender tag says the car came with a 318/727 combo but I cant be sure because the car came w/o an engine and tranny. My problem is that when the shifter is in park and the tranny is also and I have my linkage adjusted accordingly, when I shift down to 1st gear the linkage only have enough through to make it to drive not first. All of the linkarg came with the car. My question is their a difference between the 904 and 727 linkage? If so what needs to be changed. If not whats wrong?

Thanks guys