Yes it will fit but you will probably have to use weld in or bolt in engine plates to mount the engine to the car.
426 hemi or a 440 would fit real nice with no problem, a 572 crate hemi will also fit.
look for the round chrome plug in in the fuse box.
#1, a 66 coronet never came with a 440 so someone must have installed it, make sure the radiator is large enough to handle the 440 if your having heating problems, you want that engine to run 190 degrees on the open road and not much over 200 in traffic.
440 divided by 10 gives you 10%, which is 44. Half of 44 must be 5%, which is 22. So 44 + 22 = 66, which is 15%.
A 302 will fit with no modifications. I believe it is possible to shoehorn a 351 in with some mods.
no, it's too wide.
Lowest common multiple of 66 and 110 is 330.
No, it's to wide, the largest that will fit is the 351w
Yes. No problem.
no it wont fit. The body lines are different. A 66 will fit a 67
any 66 or 67 A-body seats will fit with no problem.
Not completely sure. I just picked one up and none of the listings show a 440 for '65, only the base 413. My guess is that since it was offered in the '66 model year, they just pulled it ahead in late-build '65 models. If you check your build date, that should make sense.