Auto Transmission Shifting Issue Since 4bbl Upgrade

Thank you to everyone that responded with expert suggestions and opinions. After much thought over the last 24 hours, I've decided to move forward with the following plan of action:

1. Fire my mechanic who said I could simply downshift to do the same as the KD linkage
2. Order the Lokar kit (already did via Jegs)
3. Going to visit the local trans shop to inquire about a full rebuild of the A-904
4. Hope that the trans shop is knowledgeable enough to help me hook up the new Lokar kit correctly
5. Consider changing the shifter out - I don't like the aftermarket one my Pop installed. I'll seek the guidance of the trans shop on this one.

Even if the trans doesn't need a rebuild, the Dart hasn't been on the road more than 400 miles since we rebuilt it back in the early 90's. I feel way more comfortable starting fresh. The last thing I want on my mind while cruisin' with the family is when the transmission is going to fail on me...nothing worse than worrying while driving. 'Ef that.

Lastly, I suppose I need to upload some photos. Will do that today, hopefully. Thank you again! And if anyone is in the Charleston, SC area, please let me know. Can always use someone to bounce ideas off of and to meet up at local shows. And Semper Fi to all my Marines out there!

I think @goldfish65 is in Charleston. I tagged him so maybe he will chime in. He is a super nice guy you will definitely want to meet.