Corvette 2002 engine replace to c3?

What kind of questions should I be asking and what is
your opinion about this car, how much does it worth

"It has had a lot of modifications done to it. The engine
has been swapped out from a LS1 engine to a LS3
engine.  The body has 170 thousand miles on it and the
motor and transmission has less than 100 thousand
miles. The transmission has been upgraded. The lights
have been upgraded to LED’s. It has upgraded leather
seats. It has a roll bar in it. The car has lots horsepower.
The rear end has been upgraded as well. The car is wired
and hooked up for Nitrous"

The car is red I want to paint it to White. How much I'm
looking to spend.

Since the car is automatic and have a lot of horsepower
is it still enjoyable? Will the acceleration still fast same as
manual?

since the body have 170 miles will insurance be very
high?

Any advices, opinions, suggestions will be appreciate it!