Picked up a aluminum driveshaft, and some other parts to test, trying to get time to go to a machine shop and getting some flange adapter plates.
Going to pickup a 3" steel shaft also that I believe is the right length and will not need cut down.
Last weekend I cut down a piece of 3" pvc and did a test fit, and believe a 3" driveshaft will not need any modifications the 4" aluminum will need acouple brackets modified, will find out.
But think with just 2 adapter plates made a oem driveahaft with slip will bolt in, and can single it and have a full service able driveshaft cheap.