To dyno or not to dyno?
Go to a car show and see how many of those cars run like absolute garbage. Tuning is a severely lacking aspect of our community. If you know how to tune a carb (any carb) and are confident in your ability to set a curve in the distributor, AND are willing to take the time to do comparative runs to quantify the results, then the money could be spent other places. If you want the reassurance that it’s broken in, runs good, doesn’t leak, and has a spot on tune up (depending on who’s dyno you take it to, results may vary) and you’re not confident in your abilities then the $900 is chump change, dyno it.