Hi Rick and welcome to Gadgetmanland!
I wish I had been at the Science conference in Idaho, Ron really smacked the ball out over the fence there from what he and others have been saying!!
OK, you post a lot of good questions, freind. It's late and my eyes will work for ahwhile, so I will get a start for you...
To clear ECU memory: pull BOTH + and- batt.cables from battery, connect the cable ends w/ a jumper wire, I use a wire w/ alligator clips. Keep cables away from batt!! then you can turn ignition switch w/ key to run position, and turn on headlight switch. I do this while I pull the throttle body off. Leave this way for maybe at least an hour or more though Ive heard elsewhere just a few min. will do. This clears ECU memory back to stock factory settings. I leave like this till I reinstall the TB. Obviously turn off headlight switch and ignition I remove key as positive assurance there is no extra load in system when rteconnecting cables, I conn Neg cable last.
Just keep bit away from digging into throttle shaft/axle, which is usually hardened steel. I mount the TB in a Panavice model 301,
This allows me to hold the Dremel flexshaft in both hands or use a hand to steady the other. Use a moderate speed on Dremel, on my model 4000 I usually use about 15 on the speed dial. Others may do different. I keep a small cap from spray can w/ mix of PB Blaster penetrating oil and cutting Oil and dip bit in it to keep cool/lubed, that preserves these precious bits!
Esp first few times it takes learning to get used to cutting Groove, my exp. was bit likes to riccochet a little till ya get used to controlling it. A cheap practice TB is a great idea IMHO,some have suggested to do a few practice Grooves w/ small bit to get feel, you could even then enlarge w/ med then large bit. You sound careful in your questions; I am methodical, just try it--
It feels great when you complete the first One!!
Look in
Welcome to Gadgetman Land! The Gadgetman Groove: The World's Best in Fuel Economy
here in Personal Liscense Program under topic First Real Groove. My first One was exactly the Jeep you are starting out with!
So Rick there are some hints for ya to help out, look around the Index section top left front page others have done Jeep TB's as well.
On PCV Valve re-routing, I and others have posted a LOT of stuff about that all around the site. Again check Index section in Documents and read and Read some more.
In order for us to help you, Rick it always helps to take photos of your work/projects and attach them to your postings, Everyone benefits from that!
As to bits, they are all the same,3 sizes, nothing special for vortec's.There IS a different technique for Vortecs using our standard bits. Ron has revised the Bit angle for ALL Groove jobs to recommended 22.5-30 degrees. That being the angle of bit shaft relative to TB bore wall. Just hold a bit in your fingers, touch the throttle blade/plate with top of cutter edge then slide bit down throttle plate till bit touches bore wall. Elevate bit shaft at back end so shaft is 22.5--30 degrees angle up from the TB bore wall. Notice that as you do this the BOTTOM of cutter ball pulls away from touching the throttle blade/plate. Ron explains about this in your training DVD. A hint here: experienced Gadgetfolk will notice that w/the Original technique like you see in my pics in the First Real Groove post, the bit leaves a "rash" on the throttle blade. Grooves cut w/revised angle leave far less rash, 'cause bit is only touching throttle blade at TOP edge instead of full contact of flat side of bit. You apply moderate pressure down straight against bore wall maintaining the angle as steady as possible. As bit starts cutting groove it moves down and away from the throttle blade; leaving far less "rash"
Clear as mud?
Well Rick I hope I've answered part of your questions. I tend to get into detail a lot. You have asked a BUNCH of Great questions, I wanted to point in best direction I can;) But it's late now so I've gotta go for now. You will make an Excellent Gadgetman IMHO just by your sharp questions...Read as much as you can here and ask questions, and post pics of your work as you go, so we may help each other Better!
Welcome to GadgetmanLand, Rick!!
TracyG Gadgetman Reno