Engine Swapping and Engine upgrading
1.So swapping your engine (self explaining) so you being able to buy a s*** box and then putting a good engine into it but you cant put like a 700 hp engine into it.
2.and engine upgrading would be a good fit with engine swapping because you could maybe take a Charger and put a hellcat engine in it and then tune it up to 1000 hp or something like that
(pls add this because us ppl we dont know how to grind ALLOT of money and get into highspeed chases often have trouble getting the chase unit off us)