Horse power will depend on turbo and injection pump setup.
The DT4xx share the same basic block and many components. Early blocks were 1 lifters, later truck 466s were 1.125 lifters and the really late ones were roller lifter.
Later + head is considered desirable as they are supposed to flow better.
Crankshaft stroke is different between the 3 sizes, 414, 436 and 466. 4.75, 5 and 5.35 respectively. Bore is the same at 4.3. Connecting rod is the same, piston pin height changes between the models.
I have found that the 466s out of combines and some trucks tend to have beat up rod bearings from the constant high rpm running. The 5 stroke in the 436 will take rpm better.
Ive seen 414s rebuilt as 466s, but they were restamped.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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