When I looked at this a few years ago, about the time Crazydaddyo was developing his, I chose to evaluate the Jeep 4x4 T5 because it is significantly shorter than the S10 4x4 T5 - on the order of 4" or so. See pics below - pretty pic is S10, garage pic is Jeep, last pic is my "mock up" with the duct tape representing my adapter. I collected all of the parts, but my projects have all gone on hold as life has changed for me significantly in the past few years - I'll get to them, but things need to slow down a bit.
All that said, I did some very extensive "tape measure engineering" on my '40 Coupe and came to the conclusion that by using the shorter 33-34 torque-tube/driveshaft with the Jeep T5, my T5-to-torque-tube adapter needed to be about 2-1/8" thick. I also assumed that the center portion of the X-member would need to come out similar to the way the Chassis Engineering Inc piece does with just a top and bottom plate because there was only an inch or so between that and the bearing retainer/bell. It could all be done by removing rivits, but having the body off to get the top ones out would be very helpful.
The overall length increase of just the parts (minus my adapter) was less than the difference between the earlier torque-tube, so I actually had to fabricate the adapter to be thicker than it would otherwise. Consequently, one could make a thin adapter at the back and simply shorten the '40 driveshaft/torquetube and it may require less cutting in the center X-member area - I hadn't explored that yet as I had a 33-34 driveshaft/torquetube already. I think the overall measurement of everything, without the back adapter, was just a tad over 19", I think 19-1/16" from memory. I don't recall what the early Ford 3-spd was without the rear bearing retainer/bell/clamshell, but I want to say it was in the neighborhood of 13" or so. So, the basic Jeep T5 is about 6" longer, plus any adapter...
I would suspect you could do something similar with the later cars. I don't know how much longer the torque-tube is on those, or if it even is, but my gut tells me that the S10 is too long to even consider without surgery to the crossmember and/or legs.
I do know that Crazydaddyo did make at least one adapter for the Jeep T5. However, when pressed, he said he didn't think the demand was there to make anymore. I disagree, but it's his 'production line'. I have conversed extensively with Dan (Crazydaddyo) about this. He gets a little cagey when we start talking about yokes as that's the secret to both of these. The internal spline of the yoke is an oddball and also requires a larger than normal OD to engage the seal (or a new seal).
I was going to fabricate my own shaft/yoke and have the basic drawings, but haven't made one to prove it viable, so consider that still theory. The basic idea is to machine the input shaft from a Dana 300 transfer case to mate with a machined output shaft from an early Ford 3-spd. My adapter would look a lot like the rear of the 3-spd and accept an output shaft bearing and the stock bearing retainer/ball/clamshell assembly. If that inspires you, please pursue it (good luck finding Dana 300 input shafts w/o buying a whole xfer case though).
