Break-in new lifters

Agreed with both comments above. If you don't break in the new lifters you will be replacing the cam and lifters again soon. Also as soon as it starts up (or even before you start it) pop the trans. in neutral because torqueflites don't pump fluid in park. It'll be running dry all that time if you don't put it in neutral. Be careful of course. Having the back wheels off the ground is the best way to do it since you have to run it at high rpm. That way there's no accidents.