4 door 8.25 driveshaft?
http://www.autohobbydigest.com/tables.php?17_driveshafts_slip_yoke
Too lazy to look it up,but, the info is there. If you find the length you need let me know. I have a few driveshafts laying around, pay shipping and it's yours.
You can open up the 7.25 shock plate holes. Done it plenty of times on the cheap.
Rob