i wouldnt worry about the 4500 converter as much as the gearing. here is the issue that MIGHT happen. montecarloss went from 112mph to 123 mph on a 150 shot through his 4500 CD converter on 4.30 gears. you are playing with the same converter, but 4.88 gears and you're already trapping anywhere between 115 to 118 N/A. you're definately pushing the limits. not that it will hurt anything but there could be a chance of running out of gear. oh and his converter hit HARD on the 150 shot out of the hole. too bad it broke his rear end when he did it lol.