Help prying open headlights

Hey guys, I have been trying to pry open my headlights to build retrofits but I am having no luck. I have 95-97 square glass lens headlights. I’ve tried each headlight in the oven at 300 for 10 minutes with no luck. If I try to open it up the glass lens tried to chip. Feel pretty dumb. How did you guys go about it? Thanks

 

You should be able to push the lens out from the back with a wood type handle after is been heated up,
Don’t try prying it from the front until it’s been pushed out from the backside

 

those years have seal beam headlights. Why are you trying to pry it open? You can't put retrofits in those bulbs

 

He's talking about the aftermarket metal and glass buckets to retrofit like what I did here and push the glass from the inside to pop it out

 

Try 15 minutes. Keep a close eye on them