Why is it so hard to get good advice !!???

Yeah, it is the very same Grant/Demon 850 I have had for 10 years. I just went up one jet size and changed the PV.
I guess the wideband guage will tell the tale if it is too lean. Pulling the plugs when the engine is still hot? Hell no. I've been burned before. 2 inch headers don't leave a lot of room to work around.