if you are using a gm crate motor use the flywheel that comes with the motor ,you will need a timing cover from a 87 newer rwd motor as well as the water pump if your going to a single belt .the oil pan that comes with the crate motor is for a 2wd if you have a 4wd it will need to be changed to a 4wd oil pan .i just done this swap and it was fairly easy 3.4 is a great engine