Is say your right in the ball park on price too. Sold my '06 GFX with 6" CST lift and 35's with 360k on the clock for the same money. Yours is a bit older but comes with a deck. Would be a good buy for someone id think
I think its 4'' for all single pipe applications and 6" for twins. As mentioned earlier I think you will be fine with having the one probe on the PTO side. I see nothing wrong with running a single probe if your using it for reference and peace of mind. Might as well use it if you have it.
I had the SLP one on my '08 an it did exactly what they said it would. Also it's in a nice location to brush the snow off on the go if it does get covered. That first one looks good too though
Are you getting the shafts through MVM? Just curious because I get them to build downhole tools for me. Might be able to get a titanium jackshaft from them on the cheap.
I'd be surprised if you will need an anti stab kit. I know a few guys running turbo doo's who don't need em. I ran ice age rails on my big bore for 4 years and never had an issue. That was running track ultra loose too. My '14 Turbo XM with 162X3 track I don't plan on using an anti stab kit