The answer to this question is, more appropriately, "How big is your wallet?" The frame on these cars is similar to what came on the 67-69 Camaros and Firebirds. There is plenty of room to fit a big block Chevy, Pontiac 455, Buick 455, Olds 455, and very likely a Cadillac 472/500 with factory parts. The Chevy big block can be made to over 700 cubic inches. This is not the cheapest option ($40k plus). There are many companies that offer frame mount conversions for almost any engine. If you have access to a welder, these frame mounts would not be difficult to fabricate.
how to remove a 1966 283 engine from a Nova
around 3500lbs
10w-40.
The 1977 Chevy Nova came with an inline 6 and a V8. They did not come with a V6. If a V6 has been installed you need to know which one as the chevy engines have very different firing orders.
Depends on the year
under the dash on the drivers side of the car.
I've seen a 572 fit into one with no modification to the existing fenders or hood 502 Big Block
The 75 - 76 Was a transitional year as for 69 - 74 where the same
Yes
5 on 4 3/4.
12, to 1400 rpm.
you can have anything from the 6 cyl. up to the 396 v8 in the 68 nova.