You'll get that with any group, most make up their minds as to what you
should do by what they know and think they would do. It would have helped if
everyone knew you had a "body" hanging in the closet that you were thinking
about making some changes for your own personal machine. Personally I think
it's a great idea, what could be finer that the style of the C3 with the
punch and ride of a C5/C6. I'm running into the same thoughts as I restore
my "highly collectable" '50 Chevrolet coupe. The labor is about the same as
is the parts, but when I'm done it's my car ether way. Not a good performer,
not a high yield antique if an antique at all. Just a car that I wanted and
not many other people will be willing to pay what I have in it.

If you have the money, time, and need to get a divorce, go for it. ;-)

If you read my post a couple of items down, you see my philosophy on cars
and yours doesn't violate that.  If you had said "I have this 435hp '69
convertible I want to convert to C5 suspension," or you said "I have my
Mom's '68 convertible with 15,000 original miles on it", then you see where
that goes against it.

But most C3s are not worth the effort to restore except for personal
satisfaction.  As such, most are also not going to be missed if you put C5
on the front, a 12 bolt Chevy in the rear, a blown 502 under (through) the
hood, and painted it metalflake purple.  (I'm not too incline on the purple,
but maybe you would be.)

Again, if you said you had a mint low mile '79, even with 54,000 of them
built, that wouldn't really be right.  But a '79 that is on its second or
third engine, probably missing half the original parts, and so on, sure, why
not make it run like a C5.  I remember a black '78 brand new at Bloomington
with a ZL-1 in it, I believe.  Might have only been an L-88 but I believe
the excitement in the crowd was that it was all aluminum.  Car only had a
few hundred miles on it.  It was not rare, not special, nothing, so why not
enjoy it how he wanted.