Yes
The bolt pattern for a 1978 Monte Carlo is 5 x 4.75.
yes
You can find a 1978 Monte Carlo for sale from the Cars for Sale website. Alternatively, you can find this car for sale from local classifieds such as Craigslist or auction websites such as eBay.
remove two bolt
Yes, they became mandatory in 1976.
Not without modification
yes
The Chevy intermediate sized car the Monte Carlo has been around for a very long time. A person looking for a car built in 1978 would probably have to check used sites or Auto Trader.
E-Bay Junk Yard
Yes.
try yearone.com
There are no production numbers for such a configuration, but it was a fairly rare option.