I need the main bearing bore specs for a Dodge/Plymouth 201 CI engine, circa '35-41.
Need this in order to line bore the block after installing six sleeves. Seems to have 'tweeked' the block.

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Boonter

I have an old Federal-Mogul bearing manual that has the following info:
201.3 cu. in 6, 34-41, crankshaft forging no. 612456, 4 3/8 stroke
Diameter of standard crankshaft
Connecting rod (all) 1.9365/1.9375
Main #1,2,3,4 - 2.2490/2.2500
Oil clearance - .0007/.0027

The Fed-Mogul bearing numbers are:
Con rods - 9075SB
Main #1 - 9076SB
Main #2,3- 9077SB
Main #4 - 9078SA Flanged

Not sure if this was everything you needed, but hopefully helpful. Good luck.

What you need from the Federal-Mogil book is the main bearing housing diameter. It should have the housing diameters for the rod, main, and cam bearings.

Thanks for the interest ! Del, you hit it right on the nail. THAT is the spec I need. Hopefully, rondet's book shows it.

That Federal-Mogul catalog serves a kind of a bible for measurements. We used it all the time when I worked in the engine shop.