Oil pans are also a big issue with LS engine swaps. Here we have three different pans. On the far right is the stock truck pan with a sump depth of 8 ¼ inches. The middle pan is the original LS1 F-car pan that shares a depth with the Holley cast pan on the left – both measure 5 ½-inches. Chevrolet Performance does offer a muscle car pan
CLARIFICATION: Everyone consistently calls a Vortec an LS and that is not accurate! Although Vortec engines are "LS" based they are NOT LS engines IMO. Besides most Vortec's being iron block, as seen above there are some serious size differences and considerations depending on your project. VORTEC ENGINE IN CARS: For the most part, it will be challenging to put a Vortec truck engine into a car. Most cars, even old muscle cars have relatively low hood clearances.
“Our latest manifold is the 102 LSXR, which also accepts 90 and 92mm four-bolt throttle bodies, so producing a 92mm LSXR is unnecessary. The LSXR replaced the LSX manifold because it offers multiple improvements and value over the LSX—it has both front and rear MAP sensor provisions, handles higher levels of boost, has individual runners and increased plenum volume, and it fits Corvettes without modification.