WD40 will work but The downside is it will also cause the globules on the ball hone to break down and wear out faster.
Flex hone has there own brand of oil for this application. Come to find out it just a standard 10-30W motor oil...
Flex-Hone® Instructions

 

I used Marvel Mystery Oil on the LQ9. It's a little thinner than most motor oils.
Didn't know 40 would eat up the dang dingle berries

 

Yeah, you have to be careful with the dingle berries...
I am not sure if its because of the viscosity or one of the ingredients. We use it to cut grease and remove a special Thread lubricant in the field at work. It's the only thing that works on this stuff and people are amazed when they find that out. This crap sticks to everything an no industrial soaps or other chemicals seem to work very well. It's tough to get off skin with hand cleaners as well...

I have heard marvel mystery oil works but I have not tried it myself to see what effect it has. I have used WD40 in the past and always wondered why it was going through the hone's so fast in other applications. Then I bought the flex hone crap and found out it was just a regular 10-30W oil.... lol

 

It's ghetto but I think it will work!

 

2 of the exhaust valves look different from the other 2. Is it an indication of anything?

 

Doesn't look like it was sealing 100%. Might want to get them inspected and a valve job done.

 

I was just searching for the lifter torqe specs and a bunch of stuff on lifter preload poped up. Is that something I need to do? Or just torqe to 22flbs.

 

yes, you need to check the preload or you could kill a lifter, wipe out the cam, or even bend the valves

 

Guess I have some research to do. This is not something I'm familiar with or have the tools for. Thank you

 

Lifter preload = pushrod length. The only tool required that you don't have is a pushrod length checking tool, $17.99 at the big online performance parts houses.