I already have the D300 & kinda like them. We will see.

The 4l60 came in the car & I do have the ECM with underhood & under dash harnesses, along with the column. It's all OBD I. I was thinking about getting CATS or one of the other editing programs. I am already pretty versed in Tunercat.

I have researched cams & you are right about the hotcam. There are some milder ones that are suggested for the engine. Or, I might just leave it stock w/ flowing intake & exhaust & some tuning.

When I get it all, I need to measure it all for DS legnth. I am thinking about a rad in front of the support.

Also have to figure PS pump pressures, A/C compatibility, aftermarket fuel pump, mounts, wiring ( easiest for me) & reprogramming.

Ed