You have a sweet looking '92 and 15s are respectable for what you have and in bracket racing, if your vehicle can repeat and you cut the light, you win.

My '87 D100 will have the Dana 60-2 in place by the spring time with the 4.10 PowerLock. I have the original 318/727 with an E-brock Performer and a #1406 E-Brock on top and it feels strong though it has never been to the strip...yet. It was planned to be my tow vehicle for the Ramcharger, but I may be using it in next years Car Club Challenge while I work on the Ramcharger and I may want to upgrade to a 518 like you have for the gas mileage, but I only have to drive 20 miles to Pacific Raceway and a little farther to Bremerton Raceway, so with a real tall tire it probably won't make any real difference. I have a fresh 3,000 stall 727 converter and a used Hemi converter that I can experiment with. I just love working with junk.