OK - first real question. I appear to have a driveshaft center bearing mismatch. Picture at the link below:

http://s1265.photobucket.com/albums/jj520/akierstein/?action=view¤t=WP_000942.jpg

The one I just pulled off my car, the shorter BW35 driveshaft, is on the left. Note the rubber donut thing that supports the center bearing, and the easily removeable rear driveshaft segment - it just pulled right out. The manual driveshaft that came off the donor car (I believe a '64) is on the right, and it had the kind of center driveshaft support that has two pins. I was planning on using this when I put in the M40.

First question: can I disassemble the driveshaft and put the rubber donut style center bearing on the longer driveshaft?

If not, can I swap out the part on my car so as to use the longer driveshaft as is?

Lastly, if neither of those are an option, do I just get my old shaft lengthened?

PS - my rubber driveshaft donut situation on the BW35 driveshaft is a bit torn. Are replacements available?

Thanks!