It's all out of a 05' Ram 2wd. Transmission is a 545rfe, I talked to Chris over at hotwireauto and he said it should not need a tune? Looks like a 2800 convertor is $1200!! I think if I have to run a convertor I will stay with the stock cam, too pricey IMO I would pay $500.00 for a convertor but not $1200