I might be able to help you a little, but all I can tell you is what I did with my big block. First, I do know you need to put just a little assembly lube on each end of the push rod. As for clearances, I'm not sure but I think it has to do with your lifters. I am running hydraulic lifter that have .080" of give. When I measured for my pushrods, I was told to tighten the nut down until I had about .040". That is, the bottom of the pushrod was just about in the middle inside the lifter. Hopefully this will help and other people can elaborate on this.
Oh yeah - the reason for putting the bottom of the pushrod in the middle as best as possible is because the lifter fills with oil as the engine runs, and you want to be sure to have enough lube without bottoming out the lifter. I don't know it this is only true with hydraulic, though...
|