Running Main Bearing Inserts To use A 383 Journal Crank In a 440 Block

Bewy said
I am talking about a running engine. In a running engine, the heat in the brg shell gets transferred to the surrounding metal. Ever see a brg shell fall out of it's location? That is because it overheated & the steel backing lost it's 'spring'.

You might use brg inserts on a rare vintage engine because that is all that is available, but there is a reason that inserts are not used when the correct brgs are available....
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Well if that were true the millions of 400 SBC blocks that used/ using inserts to allow the use of the 350 main cranks would have not last 40 years.

Those Saturday night stock car and bracket racing engine have flourished at much higher RPM's than required for my intended uses.

Tom