I was talking to my local machine shop about ordering some new aluminum heads. The AFR 265 to be exact, from jegs. He was telling me that I should plan on adding another $300 to the cost of the heads because they should be "checked" by the shop before putting them on. It doesn't feel/sound right to me. Any input? Am I being taken for a ride or is that sound advise? If that was the case wouldn't stroker kits that come balanced already have to be "checked" to make sure they are balanced? Which in theory means it would have to be rebalanced in order to check them?