Right angle oil filter adapter question; gaskets?

These adaptors are the WORST invention ever! Once that cork shrinks or splits there is no more oil filtration! I will not use the 68-70 passenger side HP manifold just for this reason. Give me the 71 and up manifold anyday. The little bit of extra flow from the early manifold is not worth the risk in my opinion. Unless of course it is a restored show car.