Driveshaft for short bed LS swap

[NCDEERE]

I'm deep into swapping an LQ9 into a 72 short bed. I am using LSX Innovations motor plates and factory engine mounts, 4L65E built and a factory 12 bolt. I was contemplating having a custom shaft built but decided to do a little junkyard crawl. A factory Crown Vic 1350 shaft fit my needs perfectly. I ordered a 1350 series 27 spline slip yoke for the front and will use a Moog 348 conversion joint for the rear. It fits perfectly. My yard happened to have several police interceptors in, and they have 3.5" aluminum shafts that were high speed balanced, the family car usually has a steel shaft.