okay heres the deal right now I have a bone stock 90 convertible(7-up). Im about to start working on it(half restoration half performance) I'm undercoating it so I'm stipping it all down, I am gonna build up the top end and put some gears in it (2.73 stock) so moving up to 3.27 or a little higher so I should have a bit more power . my AOD tranny has a slight slip to it and I know that they aren't to strong stock. So one of my friends is selling a built c4 with R manual valve body and heavy duty clutches to me for $350(no converter). Or I can rebuild my AOD? I was wondering if anyone had any input on this especially someone with a AOD or c4 tranny behind some power. This is going to be a very clean I cheap build I will be posting pics and probably be asking alot more questions, Thank you to all have answered questions for me you have all been a huge help.