Bore to Stroke Ratio

Dan the man said

How is this calculated? Do sbm's have a good bore to stroke ratio? I know that they have a awesome rod to stroke ratio. Machine shop suggested having the main bearing bore alignment checked and corrected if needed and then measure the block deck height and have the block decked and squared. Also he suggested having the longest rods fitted to the shortest ch pistons. Is this procedure worth it or a big waste of time and money?

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I'll try this from a simple man point of view.....

Any B/S ratio can work. You just need to match a particular engine combo with what you want out of it. Close to 1 to 1 makes a great torque engine. Big bore/sm stroke make for a winder.

So with the mains, as long as the engine is in decent condition and you have the original main caps, a hone should be all that you need for a street/bracket engine.

As far as squaring the decks to the crank centerline, that's one thing i would consider $ well spent.

Now to the long rods vs ch. Long rods can help with intake flow on restricted heads with the right cam as it will increase piston speed away from TDC/BDC and that normally helps in the mid/upper range. Again, with the right cam timing. But you can get to the extreme with that, and when you get to the oil rings crossing the pins it's only a good move for a race only engine.