I believe it's this one:
De gas tank straight
This tank was made to mount on the side of engine bay for FFR Cobras, not on the engine. My mount is a bit of a hack but it still looks good and has stood test of time. The mount is a 304 SS sheet that goes down to 3 or 4 water pump bolts and has one brace welded to it that goes back to an intake manifold bolt. Mount is light weight but sturdy as tank doesn't flop around at all.