I'm putting a Gen 3 in my 68 Dart. I have TTI headers, their biscuit motor mounts and a remote oil filter kit with the block off plate. I have the ATI flex plate to match it to my 904 (manual valve body). MS3 gold box and their harness. Other than that, I don't plan on anything else. The engines not in the car yet, so that could change. I'm changing the cam, intake, lifters, etc... right now and then it goes in.