Thanks richard that really helps me a lot in this time of seroious horsepower wants, i found those links really good to find out more that i needed to know being as this is the first stroker i have thought about putting together and i am deffinetly going to start running the numbers to see what type of LT1 that i have and i will let you know if it's a gen 2 or gen 1 thanks again for the info...