I have a 2019 crew cab stx 2wd looking to put a leveling kit on it with 295/65/20s on stock wheels but I’m unsure on what size leveling kit to get. I want my truck perfectly leveled in front and rear. No squat and no rake. Should I get a 3in front and 1in rear block. Most trucks I’ve seen with a 2.5 front still have a slight rake.

 

Beyond 2" and the ball joints start binding and you max experience the upper control arms hitting the springs. A 3" level is hard on the front end.
That's a lot of tire, and you can pretty much count on them rubbing in turns. You might consider a bona fide 4" lift.

 

Step 1 is to measure how much lower the front sits from the back then find a kit to fits your need.
Exact level, may be difficult to get an EXACT part.

As for the tire size, not sure you'll get a 35" tire under a 2wd with only a level.

I'm relatively new back into the Ford family, maybe that is a common size, however see many videos and comments about 35's rubbing the 4x4 trucks, if the tire/wheel combination is not choosen properly. Comes down to tire width and wheel offset.
Your goal tire is pretty ambitious for a 2wd leveled.

Agreed with above, a 3" lift isn't a great idea.
Probably not the direction you are willing to take, but you may need to consider an actual suspension lift, not a level kit.

 

OP. Couple things. There are a zillion people running 2.5” levels and the trucks are fine. Ford dealers install them all day long. Second, since a 2wd doesn’t have cv’s, the angles everyone talks about aren’t a concern. If you do new uca’s that will take care of the ball joint issue and potential spring hitting. A 3” lift/level is fine, several kits out there. Again, you don’t have to worry about the cv angles. But honestly, just do a 4” lift....it’s pretty easy to install, no cutting the frame and no removing of the diff. A 2wd with a 4” lift is the same height as a 4wd with a 3” lift (for the same given tire size). You can get 35’s on that but keep the offset to -18 or so on a 9” wide rim and/or keep the tire width to 11.5” max.