Vacuum Line for a New Power Brake Booster?

[Tx Firefighter]

I always bend up a hard line for a majority of the run and then connect with rubber brake booster vacuum hose. The factory did it this way a lot, and I figure the engineers are smart enough to have a reason, so I follow suit.

I've attached a couple of pictures below of the one I built for my big block truck. Notice it screws into the back of the carb. Notice, also, that I put a bulge on the end of the line to keep the vacuum hose from slipping off as easily.

People think that it being vacuum, there's no worry about the hose coming off, but there is. When I worked as a GM dealer tech, we had to do a massive recall on S-10 trucks because if the engine ever backfired, it would blow the booster hose off and the driver would no longer have power brakes.