Quote Originally Posted by DennyW
I see some no's up there on the voting. I would like to know why you would not get any more horse power if you bore the engine. Please explain it to me ?
I dunno. Maybe they're thinking cylinder deflection or heat from the thin walls will offset the marginal gains in HP?? It has been tested and proven by Reher-Morrison that aluminum blocks don't make as much hp/torque as the same build in iron blocks b/c of deflection.

The Motown 454 makes a lot more hp than the Motown 427 with the same components by only changing the bore from 4.125 to 4.250.