You made me curious and sure enough, no new sets. Hmmmmm. I wonder why? 3:36 is everywhere. And I have never even heard of 3:36. I had several 3:55 rears, a 3:08, and my '68 has 3:23 right now. That leaves scoring a new set on Fleabay, using used gears, or going with 3:36 or 3:08. That would depend on your engine and transmission combo as to whether either would make sense.