I just picked up a 3" block kit for my 87 longbed pickup. I'm wondering if anyone knows if I'll have to shorten the driveline. My roommate just lowered his 91 shortbread and had to shorten the driveline but we aren't sure if I'll have to.

 

My roommate also did a 4" block

 

I've got 3" belltech lowered leafs, and 4" blocks on my 85 longbed and haven't touched the driveshaft length.