I had to remove the dip stick tube on the Ranchero and tweak it a bit to go around the blower bracket. The little tab that braced the top of the tube had to be removed and I will figure something out to replace that. What is the best way to seal the tube to the block. I get mixed reviews on silicone and oil and I would hope to get at least a little holding strength. This is on a '70 302.