no they're not the same.
the price for a 68 impala is $8,500.00.
68 to 75 nova, the same body style will work.
The doors are not the same.
A caprice of same body style is always worth more than an Impala, provided it has the same features. IMPALA SS and SS 427 are worth more than Caprice though.
Turbo hydramatic
No, the 66 has the rectangular tail lights. 68 has round lights. I own a 66, but I prefer the 68 tail lights. google Impala images.
No. Only 1 body style in 68. The notchback came in 74, I think.
Yes. That body style came with a big block version from the factory. Also, remember that your Nova, is the same as a 67, 68,and 69 camaro, which could end up saving you some money, as Camaro parts are more plentiful.
http://www.thepontiactransampage.com/glovebox.html
Example: 1 68 37 6 S 209263 1st: Mfg (Chevrolet) 2nd & 3rd: Series (Impala SS V8) 4th & 5th: Body Style (two-door sport coupe) 6th: Model year (1966) 7th: Assembly Plant (St. Louis, Missouri) last six symbols: Production sequence, started at 100001
if you can't tell by the body style look on the rear taillight as they usually have the year printed in the taillight, such as 68.
In the master clylinder be careful not to get air bubbles in the lines.