Transmission shaft angle question

Lowering the front of the engine will help if possible. Maybe you have shimmed the engine mounts up in the past to get headers to fit better?
Lowering blocks raise the rear axle and decreases the driveshaft angle; doing this will improve trans and pinion u joint working angles.
I cut my trans tunnel and made a raised cover to get the GVOD up closer to 0*. I'm not a purist so cutting a car to make stuff work is ok with me.
I spent a good amount of time getting my setup right. Good luck