Fuel octane on hp 273charger engine 10.5:1 compression .

My engine builders first mopar was a 67 F/B Cuda.Bought it used in 68.273/833/8.34.Had less than 10k miles on it.Got it home,promply stuffed 4.88s in the rear end.Ordered the biggest cam NAPA had listed(definetly a Mellings).Yanked the heads,ported them with a sand drum,and a power drill.Best pass was 13.88@104 at Santa Maria dragstrip.That car still wears 95% of its original paint,the odometer stills says less than 80k.A sweet machine.Turbine bronze,black inside.

Abodybomber......that little 273 engine moves out !