1990 Chevy Blazer exhaust manifold/y-pipe connection

Engine Mechanical problem
1990 Chevy Blazer V8 Four Wheel Drive Automatic 178*** miles

the three bolts/studs which connect the drivers side manifold outlet to thedrivers side y- pipe have all snapped. Now, they do come out, right? And I'll need to heat them up and try to vise grip them out? Or should I just try to take the whole exhaust manifold off and replace it? But then I'll worry about snapping a manifolr bolt. I'm disabled and need to try to do this the easiest, surest way. Thank you.