[jnocero]

I seem to have two threads going on this topic, but anyway, I measured a 2006 GMC 2wd 4.3L rack, and it is 59" spindle to spindle, and the rack housing is about 21".
They are about $300 new, and $250 rebuilt.
Hard to get a photo, but you can see how the rack bolts to the crossmember in front of the engine. I may be able to lay in a piece of angle iron to my 67 and bolt the rack to the vertical, and have the lower horizontal protect the bottom of the rack tube when I am running too low.
That rack is used on vans, tahoes, surbs, pickups, and maybe impalas from 02 up on the small engines.
Look how short the 4.3 is in the engine bay!