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Wanted - 374" V8 pistons

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  • 3 weeks later...

Been there, done that long ago. Our Packard V8s are unique as far as using the tallest pistons in the modern world. Nothing in the Chevy catalogue is even remotely in the ball park. The only Chevies with a 4.125" bore size are the 400" small block which uses 1/2" shorter compression height. There is one odd-ball GM 366" truck piston which gets within .100", but still not the answer.

It is theoretically possible to use an old '63-70 Chrysler 413" piston and bore out the rod to fit the larger Mopar pin. The result will run, but will be too far down in the hole for good squish and will lower the compression too much.

thnx, jv

thnx, jv.

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