I was looking to buy a 85mm Throttle Body for my 5.7 R/T. I was told by BBK that the 85mm would be better than the 90mm for me because I just have simply bolt ons (CAI, exhaust, 91 oct tune). However, I have a friend who has a 90mm TB that he is willing to sell me for a very low price. Should I just put that on? Will any problems occur, or will it be better? Thanks a lot for your input.