My front seal appears to be leaking.Can you change it once you take off balancer does it go in from front or what exactly do I have to remove to change it out?

Talking about my lt1 here of course guys.

 

You have to remove the balancer/pulley and hub. The hub can be a little tricky to get off, as it is not wide open in the middle like an SBC balancer. A longer high grade bolt, threaded into the crank snout can give your puller something to push against when removing the hub. I suggest you search about pulling the hub, so you know what you might be up against.