Vacuum Advance w/ HEI

[lintcollector]

So the truck has been idling high, and then a neighbor came over and listened a bit, then reached in and pulled off the vacuum tube off the carb coming from the vacuum advance. It idled nice & low, sounded great. he put the hose back on and it started to increase the idle.

I am trying to find a new vacuum advance to work with the HEI on the truck. In reading through prior posts, I see some folks saying I don't need one, just to plug the hole on the carb. I guess, do I need a vacuum advance?

This is for a 72 C10, 402cbb. The truck is for my daughter who just drives it local and may get up to 40mph, but I'd like to hear her squeal the tires on occasion and not have it stall.

Do I need a vacuum advance, or should I jsut get a fancy adjustable one and then start to play with it until it sounds good?

Thanks in advance for helping the idiot again.