We were merging onto I26 from I385 last Sunday. I pulled in behind two late model 7. 3 F 450's fully expecting them to leave me in the dust. One was pulling a four place horse trailer goose neck and the other was pulling a Designer of around 34 feet. I followed them on three rolling hills where I normally don't have to downshift running 70- 72mph. All three times I pulled up on them halfway up the hill and had to slow down and downshift. After that I told the wife we were going on around and I passed them on the fourth hill. Since my truck is stock, I am wondering if a 250/630 plate is going to make alot of difference. It seems pretty strong as it is. Later I got behind another 12V on a hill and he pulled away from me a little blowing a little smoke. Don't know what he had, but he had three gauge pods on the dash. What do you think about which plate to get?