[SS427]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mockingbird812</div><div class="ubbcode-body">Am pretty sure this was the default transmission for any of the BBCs. You had to order a TH400 or an M20/21/22, as appropriate, at extra charge. </div></div>

It was. I have posted a photo of my LeMans Blue 69 SS427 Chevelle on here several times over the years. That car in fact started life as an L34, 3-speed car. It was not long after I bought it that a 2xfour, 427 and M22 were installed.