should take about 20 minutes to put in but you will have to take the little bit of air out the sytem by bleeding it again
see if you can buy a block heater kit as just the plug and cord might cost way more
i bought one for my grand prix when it was rebuilt for $18 while the parts seperatly was $120 kind of dumb.
my car came with the block heater i never added it, like i mentioned it was supposed to be part of the cold weather kit
take a good look it might be there just hidden