Complete 604 in my dirt late model, valve springs, retainers  & keepers changed every 300 laps. Always ran Joe Gibbs oil. The motor is in the car, I will be @ the Stockton swap meet Jan 10, 2009. MSD Dist, Braswel  carb, 1-wire alternator. Show up @ Stockton and here it run 6k. I have 1 1/2 cases of Joe Gibbs oil and 3-sets of springs, retainers & keepers. Drop it in & go racing. call me 831-262-2853