Yes, the carb, fuel pump and distributor have all been rebuilt and are period correct. Distributors are date coded month and year. Carb and fuel pump are serialized.
Heat exchangers are original. Media blasted and painted with a satin black epoxy enamel. The J pipes in them are new. Interestingly, maybe 13+ years or so ago, those pipes for this vintage engine were not available anywhere, so I had a CAD drawing done of them, fished for quotes, and found a bending shop in OH (I think) that could make them, about 100 at a time. I sold them into the hobby for many, many years, made a decent profit, but then another big supplier started having them made and I decided I had better things to do. But I had exactly 3 of my J pipe left in my stash in the basement and used 2 of them on this engine. They are welded in, and I have the exhaust flanges laser cut by another shop.
Yes, 4 bolts, and a few cable and fuel line disconnects, and the engine comes out. Takes me about 15 minutes to get it out. Engine weighs about 200 lbs. In the pics I posted it is on a homemade wooden enigne stand that I made. Allows you to rotate the engine 360 degrees if you want to get at various sides.