I have been rebuilding an amc 76 304 engine and have been hung up on getting the right pushrods for it. The stock length is 7.8 or 7.82 and from what i have seen i can not use that length with my roller rocker set up. I'm running harland sharp rollers, s4004-7 and the ratio is 1.6. Does anyone know what size pushrods i need to get or knows where to get the information? any help would be great.