I will give it a try....I am a bit nervous about it though

I have a 1/2 impact gun I will see it it will fit in there. I have a new harmonic balancer on the way. The little sensor on the old one broke of. I will assume that that I should install the hb then take of the nut that way I can reset to TDC. Hopefully my logic is correct.

Thank you for all your help.