May have been covered but I cant find a reference

[MTischer]

Hey guy,
Im not a newbie....I'm a NEWBIE-newbie.
I became medically disabled in 2014, but my love for all things edged has led me to retrofitting one of our sheds into a workshop so that i can teach myself bladesmithing. My current project is for a friend that helps me and my family out as much as he can. He had a broken Huskey 15/16 wrench (chrome vanadium) that he wanted reworked into a knife. I'm almost finished, but I have hit the proverbial brick wall.... the heat treat and quench. It's not the prettiest thing, but it is something of a long handled (with finger ring) slightly recurved razor.
I have scoured the s#!nternet for about a week and still have no direction, let alone answers.

So:
1) straight heat treat or differential?
2) what temps? (Using a 2 burner Devil Forge...oval, 6"x4"x16" with a removable fire brick to close off one end, and kaowool coated in refractory cement)
3) best medium (and temp) for the quenchant?

The rest I have figured out. Any/all help would be GREATLY appreciated.

Thanks,
Matt