I believe 383 was a Chrysler engine.
It depends on the transmission and any modifications to the engine.
You will need a computer tech tool, available at any Chevy dealer. You cannot do it without it.
No, the 454 cubic inch engine was not offered as a stock option in the Chevy Nova at any point during its production. The Nova was primarily equipped with smaller engines, typically ranging from four-cylinder to small-block V8s. The 454 was more commonly found in larger Chevy models, such as the Chevelle and Corvette. However, some enthusiasts may have swapped in a 454 engine into a Nova as part of custom builds or modifications.
any gas from pump available to public
Most any stock carrier without a posi with have a 2:73 ratio
radiator flush any auto parts store keeps it in stock
a 383 stroker is just a 400 crank in a 350 block...so yes
Any type of glasspacks from cherry bomb or thrush ar Flowmaster Super 10 series
i get any where from 19-21 mpg depending on how i drive and my blazer is stock other than a magnaflow cat back system.
Rockauto.com, check their site for pricing. Disclaimer: I don't have any interest or stock in them (kinda wish I did ;-) )
You need a crank from a 400 turned down to fit 350 main bearings and a set of 400 rods on the 350 pistons. Also need a flywheel and balancer from a 400. If the engine is standard bore, it would be a 377. A 383 is bored .030" oversize.