I built a 55 belair last summer to cruise with the wife and three kids I installed a 4.8 from my old 05 1500 with a 4l60e trans. I did all the tunning with hptuners. I am using the factory gauges everything is working other than the speedo not really for the 350.00 cable x box have to figure a another way to make it work. I also got a undermount heat and a/c unit installed and got compressor bracket made and hooked up just need to order condensor and lines to finish a/c before summer. I also am going to try to get z06 wheels and run 275's front and rear this winter before time to cruise again.