I used the entire I-4 back plate, flywheel clutch, and input shaft package with the 300 motor.
To mount the engine, I had to use the I-4 front accessory drive and cover, thats where the problems came in. 300U used 1/2 dowel pins (I-4, none) and larger 1/2 bolts (I-4, 3/8) in the face of the block. I had to step down the bolt holes in the block, drill the dowell holes in the acessory drive plate and shave the dowell pins flush with the plate. The 300U's magneto drive had a slightly different bolt pattern requiring me to use the I-4's.
Outside of needing the older I-4 front cover for its engine mount, it was all straight forward.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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