904 shift problems

First things first. I have a 904 trans with a trans go 2 shift kit.
It is in a 66 Valiant with a 360 LA engine. When taking off in
drive on the column shifter it does not start off in first. If I put it
in low on thr column it with start off in first.I can then shift the
shift lever to 2nd, and it will shift to second. When I move the column
shift lever to 3rd. it will not shift to 3rd. unless I momentary let off the accelerator/ What am I missing? I did adjust the linkage to make sure
it is in the detents.I almost forgot I have the Boucillon kickdown linkage set up. ANY suggestions will be greatly appreciated. 63 Toad