After going around and around on listening to individuals (dealers, sales people... amazing how much conflicting info they will give you), surfing the web, trying to figure out all the calculations about matching an existing TW to a new TT, I discovered this YouTube by the Recreational Vehicle Safety and Educational Foundation. They have great info/videos on RV'g Matching Trucks to Trailers
We are in the ballpark but we are off to the CAT Scales
to get accurate data.
Hope this helps those of you who want to have accurate data for your TV & TT.
I am sure you seasoned RVers this is second nature.