Something In my #5 Cylinder?

Whatever it is that you may do, do it one step at a time. Get a new short block, get it running. Then start experimenting with ignition and fuel. If it’s just a drag car - I don’t think you’d really care or see much improvement with more ignition control. You stomp the pedal, 20ish degrees ignition timing and 11.5:1 ish afr and that’s it. As long as it starts and the idle attitude is ok. But I’d be shooting for 1.5- 2 degrees of ignition retard per 1 psi of boost. And cut back boost to 6-8 psi. Then experiment with each pass, check plugs, make adjustments, repeat. Add boost, add timing slowly. All the gadgets listed in the reply’s above are great and I use them too - but they really just make it simpler and faster to tune. And they also give you better driveability and power between idle-wot. It sounds like you live at idle and at wot - not in between. A quality afr gauge is a must. Data logging is super helpful, as well.