You car weighs what mine weighs.2450 car and 220 for me.I run a 4.88 gear set currently and leaving at only 3600 can get a 1.40 -41 60 in the heat(1.36 to 1.37 turned up in the heat) .Think you may be onto something with the converter.Got the power,e.t is good but 60 is suffering. Lower gear set like said should only pick up a few hundreds but also may cause you to have addtional starting line issues. :wink: .I was running a 5.14 gear set with no wheelie bars only to stand the car straight up and come down and do some damage in 03. Afterwards a set of 4.88's wheelie bars and all was fine.