Ideally to get them to fit the best they should be custom on the car. Companies attempt to sell a somewhat universal solution that still needs massaging. I hear the Hooker Blackheart and Hedman fit perfect no modifications between LS, 4L80 and a G body frame but they don't make them anymore. American Racing make a nice set apparently but at $1500 ill make do with the speed engineering. If the LT's clear the 4L80e I would assume they would clear the other transmissions.Wouldn't the exact type of vehicle/ transmission to be fitted need to be known to know what the fit will be like?
For example I have a 6.0 in a 1985 442 with a turbo 350. I've heard hookers are the best fit?