The hood is available reproduction also. The 277 is a very neat engine.
Oil injection could be added as some engines had oil injection. I make windshields for these. The item "1969 Ski-Doo Olympic 12 3 Modified Snowmobile Project Solid Chassis" is in sale since Monday, September 20, 2021. This item is in the category "eBay Motors\Parts & Accessories\Snowmobile Parts\Body Parts".The seller is "ddubstreasures" and is located in Mooreton, North Dakota. This item can't be shipped, the buyer must pick up the item.