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louwilouwi · 06-13-2021, 08:55 PM

Model B engines had a pressurized oiling system to the main bearings. This is why the valve side cover is about 1" taller, the extra area covers the pressurized oil galley. If you check with A & B engine rebuilders most will say that re-machining the B blocks is challenging. They seem to be thinner castings and are easy to machine through where you do not want to. The Diamond B blocks are much better. The castings are thicker and they make great engines when rebuilt and put in an A.... That is what I have in my 31 W/B PU.

06-13-2021, 08:55 PM	#8
louwilouwi Junior Member Join Date: Jul 2017 Location: Nor-Cal Posts: 4	Re: model b engine cm gear Model B engines had a pressurized oiling system to the main bearings. This is why the valve side cover is about 1" taller, the extra area covers the pressurized oil galley. If you check with A & B engine rebuilders most will say that re-machining the B blocks is challenging. They seem to be thinner castings and are easy to machine through where you do not want to. The Diamond B blocks are much better. The castings are thicker and they make great engines when rebuilt and put in an A.... That is what I have in my 31 W/B PU.