Destroked Small Block?

and Pontiac
I worked on the Mopar (which evolved after) and the AMC which was supposed to use a 4.060 260 block but we used a 4.25 Nascar block and a short crank
some comments
GO LIGHT ON THE PISTONS using old TRW forgings makes a slug, use a modern cam- the old 340 cam will be gentile up to a certain rpm but will not make horsepower
it's all about cylinder heads no mater what the cu in
I'm with Stroker Mc Gurk
Our second AMC said 360 in the side of the block and was supposed to be 304 like the main motor but was actually 427 inside- Same as Hayden Proffits Grant Piston Ring Blown Fuel Funny Car
the actual horsepower was not that much different- now torque below max HP was an entirely different story
The cubic inch rule did not really limit power output with the same heads
it did save transmissions