nope rpms shouldn change on which motor he has but if the tires have wear and I think it can fluctuate a little between a 4r70 and 4r100 but not sure.
I have a 5.4 but I'll have to wait and test tomorrow. Unfortunately I don't have a tuner (yet) so I won't know an exact number but I'll be able to ball park.
just remember when your taking a pic of your speedometer/tach to keep your eyes on the road. had to tap the brakes a few times lol
dang dylan i was almost right on with urs! i said 50 to 70 more rpms than his and it turned out to be 68!
oh yeah, not really a big improvement but you can squeeze a few more mpg's out of her hell yeah! not bad