Can ANYONE help me please!!!!?

Hi i have a 2000 Chevy cavalier. I have several problems with this car...its a cavalier. Well its my only car that i can afford epically with the gas being so high. One of my major concerns is there is a loud knocking noise when i step on the gas accompanied with major vibration, it sounds like the motor is hitting up against something. I have changed the motor mount the toque mount and the transmission mount still does the same thing. I think that when i replaced a mount some how the motor got tilted some how idk, i replaced all 3 at different times so if that could be a possibility i would like to know. There is also oil in my blow by but none i can see in my air filter what does that mean, and what do i need to do to fix it? I have already replaced the motor in this car because my timing chain broke and the person i sent it too said it would be cheaper this way. I have no idea how many miles are on the motor just the vehicle itself. I plan on rebuilding the motor or just replacing it myself with maybe a 2.4L or a 2.2L, 2.4L Ecotec, if anyone could help me find a website that has rebuild kit's or that sells these motors that would be great. It's just a basic 2000 chevy cavalier with a stock 2.2L engine in it.Can ANYONE help me please!!!!?
First off the knocking noise could be one of your CV Joints. A bearring could be broken.

If you replaced your mounts and got all the bolts are back in theres no way it can be tilted.

The oil could be a bad PCV letting oil get by. Change it. Next do a compression test to make sure it's not piston rings and or seals.

Run some Rislone or Zmax in the engine to help clean out any build up sluge and or varnish.

Stick with a 2.2l that way you don't have to do any thing with wireing or computer.

rebuild kets. Summit Raceing, Jegs, or even your parts store should carry rebuild kits.

Check the front end out before your go doing any engine rebuilding.

A timing chain isn't that bad to change.

Hope it works out for you.

Email me if I can give any more help.