U joints recommendations

[Kurt S]

This is not a weak link. I agree with non-greasable to be stronger.

[Lynn]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Kurt S</div><div class="ubbcode-body">This is not a weak link. I agree with non-greasable to be stronger. </div></div>

Good point.

So... what is your opinion regarding what is likely to break first.

For sake of discussion:

Modified small block about 425 to 450 horse, about 400 torque
factory z clutch set up (flywheel pp and disc all factory type)
unmodified m21 trans
factory drive shaft
factory eaton 4 series posi carrier
richmond 4.10 gears
drag radials