The engines are basically the same internally, but the I, O & W mount the engines totally different, so the back plate on the engine is different and the front cover and maybe the entire accessory drive is different. I put a '55 C152 engine from a 300 Utility into a'47 I-4 and had to change up both ends to allow it to mount up. The front cover change neccessitated changing the accessory drive backing plate because one hole on the magneto drive wouldn't line up. In my case I also had to sleave down the 1/2 NC holes in the C152 block to 3/8 NC along with redrilling the plate's dowell pin holes to a different size and location to match the '47 front cover. It all worked out fine, but was a headache that took a lot of head scratching and trial fitting.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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