With Gen III Hemi engine swaps becoming more common, manufacturers have taken notice of these Hemis breathing new life into old Detroit iron. The manufacturers are embracing this market, producing new products to make swapping easier than it was a decade ago. In 1957, Milodon started producing oil pans with increased capacities for racing.
From there, the company developed aftermarket pans for production engines that incorporated oil control baffling, windage trays, crank scrapers, and kick out pan options. Milodon has kept a finger on the pulse of the newest trends in automotive. To meet the needs of the Gen III Hemi swap crowd and the late-model enthusiasts, Milodon currently offers five oil pans that cover the 5.7, 6.1, and 6.4-liter Hemis and two pans for the 6.2-liter Hellcat Hemi.
For all the pans, there are a few things in common. All the Milodon pans can accommodate a 4.080-inch stroke with a factory connecting rod. Some factory parts will work with the Milodon pans; in most cases, the reuse of the stock windage tray is acceptable, and some have had luck with the Jeep GC and the 1500 truck dipsticks. Milodon requires the use of their pan-specific oil pickup and oil pan bolts (5mm shorter than factory).
Milodon windage trays, dipsticks, and pan gaskets are available for each pan. Most of the pans work with aftermarket header manufacturers. However, the use of factory manifolds is a hit or miss affair. For ease of determining which oil pan fits an application, we have individually listed each pan, starting with the most versatile oil pan of the bunch.
The Milodon 31000 Street and Strip oil pan fits the 5.7-, 6.1-, and 6.4-liter Hemis (including 392/426 strokers). It’s a 6-inch deep, center-located wet sump design with a six-quart capacity that fits 1959-74 A-, B-, C- and E-bodies without the need to modify the factory k-member. As the name suggests, this pan is outstanding for the street providing excellent ground clearance and can meet the rigors of daily driving. When it comes to the strip, the sump baffles keep the oil at the oil pick up during hard acceleration. The oil pan does not interfere with the factory center link or steering linkage.
Milodon’s 31003 Pro Touring pan fits the same applications as the 31000. This low-profile pan has a 5.5-inch, center-located sump and a seven-quart capacity. It fits into B and E-bodies, and it will fit most A-bodies; but some may require minor factory k-member mods. The pan clears most aftermarket tubular k-members. The 31003 pans provide excellent oil control during aggressive acceleration, hard deceleration, and road course type turns due to trap door baffles and windage controlling driver- and passenger-side pan kick-outs.
The Milodon 31002 Pro Touring oil pan is a similar pan to the 31003 with the same vehicle applications and features. The difference is the sump location which has been moved rearward to the back of the pan. Moving the sump rearward allows additional clearance for a rack and pinion on a tubular k-member.
Slipping a Hellcat 6.2-liter Hemi into a Mopar muscle car necessitates the Milodon 31030 pan. The 6-inch center sump, six-quart oil pan is designed to work with most A-, B-, or E-bodies with stock k-members. Oil baffles control the oil movement in the sump area. The pan will fit with most aftermarket tubular k-members.
The 31032 rear sump oil pan is for the 6.2-liter Hemi, and it works with a tubular k-member and rack and pinion in the early Detroit iron. The pan is 5.5-inches deep with a nine-quart capacity.
For those that want a better-quality pan in their LX/LC/LD/LA Hemi Mopars, Milodon has a pair of front sump pans. The 31001 Road Race pan has a nine-quart capacity and an 8-inch sump with built-in oil control trap doors. This pan is just over two inches shallower than the stock oil pan for additional ground clearance. The second pan for the late-model Mopars is the 31005 Drag Pak Race pan. It has a 7-inch sump and holds six quarts of oil. The pan is equipped with double trap doors to keep the oil from creeping out of the sump during the heavy acceleration and deceleration the Hemi will experience at the drag strip.
When it comes to oil pans for the Gen III Hemi, Milodon provides a variety of pan options to meet the needs of almost any Hemi owner. In many cases, the owner can reuse the factory windage tray and dipstick (or fit another OEM dipstick). Since each application is a custom swap, the use of specific headers, exhaust manifolds, aftermarket steering linkage, and even the factory k-member may result in interference with the oil pan. For the best advice about your vehicle, contact Milodon for their latest information on each oil pan’s compatibility with factory and aftermarket parts.