Originally Posted by TimAT
Factory horsepower ratings L-88 427 is 430HP, the L-71 427 is 435, and the LS-7 454 is 460. The 454 will have a bit more torque (longer stroke). The reliability and weight is close enough to the same on all 3 to not be a factor.
Seeing as the original poster is a newbie, it should be stated that the L88 was in reality much higher in horsepower... it was a high compression (12:1) racing engine with over 500 hp!!!
Not ideal for street use today due to lower octane fuels, but definitely much more powerful than the factory rating of 430hp!