904 shifting problems 2nd to 3rd

Man your putting a fresh stroker engine up to an old trans--its going to slip !!

If you don't mind shirting yourself you might want to look in to a manual valve body for the trans and ditch the kickdown linkage--the tranny might last longer..that engine is going to be putting out good power at part throtlle--a cable vs the rod would be best if you don't want a manual valve body