Dash Swap
Don't cut the gasket (unless it is cracked badly)-- if it has a lockstrip-- it will come out rather easily--- I've pulled numerous 60-64 valiants & darts--.
pull said lock strip--- you will need some wood or plastic wedges-- I used wood shims from the local home depot.
clean out any goop/sealant where the gasket & glass meet
roll the gasket lip away from the glass with your hands (all the way around)
start in a corner & gently push out the glass
place shim between glass & gasket--
now work your way around the glass---
it will come out easily once you get going
I try to do the top first & then just roll it out of the bottom gasket when the top is loose.
The sun is your friend-- just don't hurry it works , Lawrence