i built a 454 to replace the missing 396 that was in my '68 El Camino SS, I put 11:1 pop up pistons in and liked the power so I milled the heads and needed to run Cam 2, I figured if I was paying $3.00/gallon for 110 octane leaded then I might as well go all out so I bored it .125 over and added 14:1 domed pistons and that did it. The car was 4 speed so the only way to start it was to pull/pop start it because it wouldn't hardly crank over. Long story short it blew up, the cylinder wall split between # 3 & 5. .125 is too much overbore, that lesson cost me about two grand to find out. Funny now 87 octane costs $3.00+.
and I'm not that old. Oh yea it didn't blow up right away, first thing to break loose were the tires so I added slicks and custom bodywork, then the wheel studs snapped, new axles fixed that, then the driveshaft twisted itself into a pretzel, I fixed that and then the flywheel bolts sheared off, once all the weak links were fixed it pulled pretty good. I'll have to dig out some old time slips from Lebanon Valley and Epping. It only ran 12 seconds but it would yank the wheels off the ground on the shift to 2nd gear. Pretty fast for a 3800 pound car with a 200# driver.