I want to use a locking dipstick on my TH400. Im looking at the one from Hughes. Are there any clearance issues with a 400 in a Malibu ? I see a lot of Malibus with the flex dipsticks from Lokar. The car was set up with a TH350 when I bought it. Its still going to be a small block. Hate to spend the money and find out the thing wont fit !