So my 79 Malibu is running a 406 SBC 700r4 trans with a 8.5 GN rear diff. Last year all stock suspension 255 et streets with power steering and belt driven water pump and a 3.42 rear gear with an Eaton locker it ran a 12.3. Over the winter I converted to electric water pump, manual steering box, umi tubular rear suspension/adjustable uppers fixed lowers & sway bar with chassis braces. I just installed 4.10 gears drag bags and notched the frame for 275 tires. What do you all think my E.T. will improve to?