Flaming River Power to Manual Adaptor

I bolted in a manual steering box last night in the 69. When I was tapping the shaft down, my vise grips slipped, and I hit the joint, causing it to fly into a few pieces. I also found out that the splines are bigger on the manual box. So, I gotta buy a new joint.
My question, should I get the Flaming River (FR-1505M) power to manual adaptor? It's about $190, but it says its for the conversion. Or should I just buy a swivel joint for a manual and extend the steering shaft? I want it to pin to the steering shaft like the factory unit.