I have a 66 Mustang 289 Coupe I am replacing the timing chain on. I am having a problem installing the front timing cover crankshaft seal. I used a seal driver to press it in, but it will not go all the way down. I can see a gap of about .025 between the cover and the seal on the front side. Isn't it supposed to go all the in so there is no gap? I am afraid if I hit any harder it will damage the seal. Does anyone have any suggestions? Thanks