I'll be tackling a beautiful 1947 Oldsmobile 66 Series with a 238 L6 engine, Hydramatic. Also, a 1947 Oldsmobile 98 Series with a 257 L8 engine. And finally, a 1940 Oldsmobile Series 70 with an L6, not sure which displacement yet. Here's my question(s): I'd like to get as much information on these flathead engines Oldsmobile used before the Rocket V8 came out. Hopefully I could do another compilation for these engines like I did for the 303/324/371/394 engines. I've found secondchancegarage.com has some very handy basic information for the flathead engines from 1946 on and that's all I've found. So please, if you have anything to contribute... Does anyone know where I could source a new starter for my 1947 238 L6? The previous owner's friend/brother/something took the housing apart with it still bolted to the engine and the internals have been exposed to the elements for the last several years. I know Fusick's, Kanter's, and EGGE offer parts for these cars, but please add any other companies that you know of. I have a good understanding of OHV engines and how to tune them, squeeze more power out of them, etc. However, I am a novice with flathead engines. I understand the principle of how they work but I am not familiar with how to treat them as opposed to the newer Oldsmobile V8s I'm used to. Could one realistically mill the cylinder head to raise compression so long as the valve clearance to combustion chamber roof is checked? What kind of clearances do these engines need for the camshaft, rods, mains, etc? What other options do I have in the way of freshening up these old motors? Is it possible to have hardened valve seats installed in the block for daily usage of modern unleaded gasoline? Is valve recession a problem with unleaded fuel? Would it be a good direction to study articles on Ford flathead engines? What publications should I search for? How does one setup points in the distributor? (Sorry...I'm spoiled with HEI.) I'll be searching for an old Oldsmobile service manual, obviously, that will be my primary study guide. Before I turn any bolt or nut on any of these cars, I'll be juicing up all of these cars with PB Blaster for a few weeks to discourage broken fasteners and busted knuckles. Thanks guys!