Turbo 400 bolt in yoke ?

[bigolddog]

Ok here it is. Doing I6 3 speed to 454/400 swap and i'm dealing with the trans yoke. The problem is the bolt in yoke!! I've done some research and don't like what i've found. It seems that i can't just swap the bolt in with the slip in because the shaft isn't splined far enough in. Is this true on all bolted shafts or is it possible for the first time on this project i might get lucky and the slip yoke work? Haven't bought the slip in yet to try. Thought I'd ask the expert's first.
Any suggestions would be welcome. Thank you