I may have answered my own question. Good thing I am retired and have lots of time to research
this type of thing!
GKN were the pioneer of CV joints, and a huge worldwide manufacturer of CV joints.
I noticed Aquadrive systems on a GKN site?
GKN seem to be the OEM for the Type 2 and 930 CV joints, but not 100% sure?
T2 are 100mm x 33 spline x 18 degrees max angularity per joint x 30 wide
930's are 108mm x 28 spline x 22 degrees x 40
TQ in Nm = (KW /RPM) x 9680 x Reduction ratio
For the Beta 90 and a 2.2:1 gearbox
this is 685 Nm
Type 2 CV joints at 2900 Nm should be fine and a lot cheaper than 930's
Note the 11mm plunge depth
or the amount of axial movement permitted per joint to accommodate any fore/aft movement of the engine/shaft
The trick will be getting the jackshaft machined using the proper material.
Impossible I bet in the Philippines
, and the best will be milled splines on a length of HTSR steel
I ship over myself
T1/T2 axles are larger on the splines than the shaft and act like a torsion bar under heavy shock loads. Impossible therefore to shorten
I would not count on Chinese T2 replacement CV joints being this strong!