Thanks Barry,

I have found a timing cover with a molding in tab like on the 70 and up but on the passenger side. I have a compete 67 273 sitting in my shop that has a passenger side bolt in. I was told the bolt on was 67 and down but the molded passenger side was 68-9 and then of course the driver's side molded in is like my AAR and my other 71 and 73 340s are for 70 and up.

I was also curious if the 273-360 all used the same timing cover, for some reason I was thinking the 340 and 360 was different.