This. I ran a 3.5" aluminum driveshaft on my nitrous Nova for years. 2 stages. 940hp. 1st stage hit at 0.50 seconds. Had it balanced at the beginning of every season and no issues ever. That car took a beating too.
I found that most driveshaft/tailshaft failures with A Bodies are because the axle is not correctly offset for the additional 1-3/16" on the drivers side. That, combined with incorrect pinion angle, can cause a tremendous amount of strain and vibration and lead to failure. Carbon fiber driveshafts are more forgiving. Aluminum will crack lengthwise. I've never used chromoly