Put one of these one fits all on the F350 / 460 a few months back and over all its been a much better carb than the stock reman Holley motorcraft POS that was on it before. Yesterday I gave into the urge to nail it on a open stretch of road near the house and then it stuck wot. Its not the linkage but something internal is holding the secondaries open 3/4 and it will not release. ended up starting the truck in N and mashing the brake the last 1/2 mile into the driveway. any ideas?