Dave,
I went down this path on my '68 L35 a couple of years ago and never did get to the bottom of what's correct.
Here is the thread I started which may help you.
http://www.camaros.org/forum/index.php?topic=13589.0
BTW....I believe you are correct in that what HBC calls correct for this application really isn't but lack of confirmation of what really is correct has forced me to use this fitting.
Bob
Thanks Bob. It looks like Joe was able to answer for my 69. The AIM doesn't differentiate between 68 & 69, so I'd reason to bet yours would be the same. I attached pictures of one I have below.
This is my oil line. 1969 L35 w/factory gauges...Joe
Thanks Joe! So yours is confirmed original correct? I have an original one just like that, but all this time I've been searching for one with the extra bushing like the AIM calls out. Obviously the AIM is far from perfect, so I guess this is one of those occasions. Thanks again! BTW, happy birthday to your 69 next week. My 69's bday was yesterday.
I had the rest of my original oil line. This was the part I needed and luckily I had found one.
Joe's pic so I have them all together and one I have from someone that said it was their original on a 67 L35. EDIT: HA! I read your thread and I just noticed that I must have saved this pic from your thread (Bob's Camarocards). Apparently this pic belongs to MikeS. Thanks again guys!