Tri-Y headers

Does anyone have any experience with these?

B/RB Tri-Y Headers

Any thoughts or comments?
I have a 62 B body with 383 moderate street motor. I'm not going drag racing or anything like that. I just want the exhaust to fit without any leaks or rattles.
I need to pull the motor to fix a few issues (including the exhaust) and came across this website.
I read that they somehow interfere with a z-bar but can' see how from looking at the pictures. I have 4 spd. and it works fine and prefer not to go hydraulic.
Author: zorb847