[454HO]

Okay, here is the skinny. The truck style output shaft on the TH400 and 4L80e has a shoulder up inside the tailhousing that acts as a stop for the bolt on yoke. A normal slip yoke will bottom out on that shoulder. What Denny does is machine (counterbore) the inside of a standard slip yoke so that it will clear that shoulder. He did not tell me the diameter or depth of the counterbore or even if it was a critical dimension. He did say that cutting off the end of the yoke was a bad thing... it makes it too short.

So I placed the order for my shaft. Mine measured 60-5/8" from the trans tail to the face of the pinion bearing (no yoke). I am getting the Nitrous Ready shaft, truck slip yoke and forged pinion yoke for 1350 U-joints. The shaft will be 3-1/2" diameter due to the length. My total cost with shipping (oversized box) is $596.90. That includes the $30 web discount for this week.

Oh yeah, he has about a 3 week backlog right now.