This is assuming a stock valve body, stock shifter and all correct linkage parts including the shift lever on the transmission. Some aftermarket shifters and valve bodies have different "throws" and have to have a corresponding shift arm to match. It is pest to do as you say and make sure the linkage drops in, then put both at the opposite end (first or third depending on shift pattern) and make sure that the linkage still drops in. Sometimes you have to weld up the hole in the shift arm and re drill it in a different spot to increase or decrease the amount of throw.
