[Power Surge]

Well, as a dyno shop owner myself, here's a few tips...

- Make sure the car is mechanically sound. The last thing the dyno shop wants to do, is chase down mechanical issues while trying to tune the car.

- Find out if they have the parts to tune the carb. I stock a full Holley jet selection, as well as the non-stick bowl gaskets and other assorted parts. If they don't have them, you'll need to bring them yourself.

- Make sure they tune the car in real world conditions. Don't tune the car with the air cleaner off, unless you plan to drive the car with the air cleaner off. Make sure they have a fan in front to simulate road wind and keep the car cool.

- Prep the car before going. Make sure you have the gas you want in the car. If you've never taken the bowls off the carb, get a set of the non-stick bowl and metering block gaskets, and pull it all apart yourself first. It takes almost an hour to pull it all apart and scrape the dang stock gaskets off. It's free if you do it yourself ahead of time. You'll pay for it if they have to do it on the dyno. Make sure you rear tires are at proper pressure, and equal.

- Make sure they pull the car in whatever gear is 1:1. That should be 4th gear, for both a toploader or a 5 speed trans.

That's pretty much the basics. How well they tune the car will depend on them. I've been flown to dyno shops all over the country for tuning by car clubs, and it still amazes me how clueless some of these places are. Just pay attention to what they do. If you have a decent knowledge of this stuff, you can easily see if they know what they are doing or not.

Hope this helps!

BTW, Stu, I have a question for you... was 4241 a single or dual carb motor originally?