[twobjshelbys]

Think of it this way. Speed-density fuel injection systems have to be adjusted to your configuration, and if anything in that configuration changes, you have to adjust.

A carburetor is adjusted to your configuration, and if you change the configuration, you have to adjust.

MOST NOTABLY ALTITUDE!

A speed-density fuel injection system is essentially an electronic carburetor. They have the same amount of intelligence. One is a brick tuned by mechanics, the other tuned by a laptop. But, setting up a carb is a lot less costly in hardware, less costly in setup and less costly in maintenance.

Heed Ed's words of advice. If you aren't going to use a MAF based fuel injection system, stay with carbs.

I see some people setting up their advanced MAF systems using speed-density mode. Build that tune for sea level and put it in in Denver and you're off to a tuner for more expense than rejetting a carb. Use the MAF and (with a properly established altitude compensation table, or nowadays, automatically using O2 sensor AFR feedback) will take care of it automatically.

Good luck.