I'm reassembling the emging for my blazer, just got everything back from the machine shop. This is the first SBC that I've assembled, so far its been very easy. There was am outside and inside tube for the oil dipstick. How does the inner one go back in? Does it need to be there? Thanks. BTW can't wait to get it going again. One step over stock cam, high volume oil pump, completely went through the heads - they were shot.