No, the 390 uses a C6 transmission and the 289 uses a smaller C4.
Yes, It's an easy repair Do a compression check also to verify the rings or piston for the noise
As long as there is oil in the engine it can run. If it has not had an oil change for a year even if it was stored I would change the oil/filter before driving this car.
" without having to change anything " NO !
Yes. Depending on the engines there may be work that have to be done though. Ie you can't put a Prelude 2.2 VTEC engine into a Civic 1.5 without having to modify / replace wire harness/axless/engine mounts/etc. A change from / to the same engine should be a plug and play job though.
Yes, you do not need to remove the engine.
Regular servicing.
It should be the same, you're biggest problem will be kepping all the smog equipment ford is well known for their bellhousing. you may have to change the bellhouse from the trans. to the engine. you wont have to change the tranny, but you may have to change the bellhousing to match the 302 bolt pattern
Yes
Yes, you can replace just the tank of a toilet without having to replace the entire toilet fixture.
Theres bound to be changes but for the most part the only think it comes to mined Motor Mounts.
no,not really
Many times, it is possible to use an epilator for 10 to 15 years without having to replace it. This will help you save money from having to buy disposable and electric razors.