Yes, They will bolt right up.
It is in the exhaust pipe up by the engine exhaust manifolds.
It will have two, one in each of the exhaust manifolds.
They are the 4 large holes on the outside of the head where the headers or exhaust manifolds go.
yes you might have to change your exhaust manifold
Usually around 1300 F. give or take 100 degrees.
yes
this is a mechanics job you have to remove inlet manifold,exhaust manifolds,and then remove heads to replace the valves
Yes it will go wright in with no problems. as long as the 1987 is a TBI and not a carburetor fuel system. May need to change exhaust manifolds and motor mounts,
If the 454 is complete with accessories such as exhaust manifolds, a/c, power steering, alternator, etc., it should be a pretty straightforward swap. Transfer the motor mounts and distributor from the 350. A new exhaust system will likely be needed.
It's mostly a bolt-in. Bring over the accessory drive with the new engine, along with the exhaust manifolds. Transfer the distributor from the 350. "some assembly required"
Most Chevy small blocks with cast iron intake and exhaust manifolds are about 550 lbs.
That year has 2 of them and they are screwed into the exhaust system / pipes.