Does anyone have a Mercruiser jackshaft assembly collecting dust somewhere?

I'll be coupling a 350mag to an alpha, then eventually a Bravo. From what I can tell, the assembly is the same for either Alpha or Bravo...

A shot in the dark also. Are you referring to an input yoke as a jackshaft?
They're usually "with the drive" anyways. So I don't see the concern over a sole shaft.
Even if they are the same (there are many variations depending on drive serial #) there is more to it than that shaft, converting from an Alpha to a Bravo if you aren't aware.

No, not an input yoke.

Commonly called a jackshaft, mercruiser calls it an extension kit, it's a series of parts to connect a remote mounted engine to the drive, much like the drive shaft in an automobile.

i have shafts
carriers also
and spline drive adapters for couplers

That I'm aware.
Just not very common in the boats on this forum. With Alphas anyhow.
That is why I asked.

I didnt think it would be common here but, yall seem to have shops and garages full of parts, so I figured it was worth a shot before paying Mercruiser list.

It seems I do not have enough post to initiate a PM.

I'm not too familiar with the individual parts. Do you have all of the parts needed to constitute a full "extension kit"?

Thanks,

Steve

You're at 10 post so you should be good to go to PM.
This link for this # 98634a20 has "where used" at bottom of page.
Unless you get a used shaft, I don't think the kits come with shafts themselves as they are all going to be custom lengths depending on boat setup.
Here is a parts lookup view:

Correct, the shaft itself is not included in the kit probably because of the custom requirements. I can have a shaft built and balanced local. And yes, that is the exact kit part # I seek. I didnt think most people would know the part # for something collecting dust...

Yup I have it all