NE Indiana new to tuning

Hey everyone looks like there is an endless amount of reading I need to do in this forum so I guess I’ll be in here throughout this coming winter.
I am working on a (nearly) frame off rebuild of a 94K3500 crew cab long bed truck. It has a TBI 350 and a HD NV4500 5SP

I intended to do several performance upgrades in a piece at a time fashion and wanted to be able to tune things throughout the process.

Im not even sure where to start with tuning. I had either a DynamicEFI flash EBL setup or a 0411 pcm, vortec harness/reluctor/crank sensor/distributor setup.