After tearing my 317 Lincoln y block down, I'm trying to find out if my car would lose a ton of value if I didn't keep the original engine. The block and heads are in good condition but it needs to be bored out and finding oversized pistons or the next size up, the 341 pistons is proving difficult. I was considering building a 302 or 351 and put it in but wanted to keep it original. Kinda thinking about all options at this point. Don't want a race car but dependable cruiser. I appreciate the advice

Brad
Sierra Vista Arizona
1954 Lincoln Capri

$1822 for what, I'm assuming, are old-school cast pistons and iron rings, is unconscionable. Although you can't find a listing for pistons online, try contacting the manufacturers that make custom-order pistons. 
I agree, with few exceptions, that a 4-door will be worth considerably less than either a 2-door hardtop or convertible. Unless your car has sentimental value, and you have deep pockets, I would pass. It will cost as much/more to restore your car as one that would be worth considerably more when finished. Even so, most restorers end up investing considerably more than what they are able to get when they want/need to sell.