Interesting air cleaner on this 273 Dual Quad
On my mini tubbed Dakota I recently did the intake manifold plenum plate re seal. While the keg was removed I set my Offenhauser dual quad on the 5.2 as well as a Weiand Tunnel Ram. The 273/318 Offy probably will work great with OEM Magnum heads. The Magnum heads have smaller intake ports than the LA340/360. The intakes designed for a 273 don't have enough cast in meat to seal appropriately on the LA 340 port.In fact when the Roots Blower manufacturers would convert Offy intakes into LA blower manifolds they first welded up the flanges and partial port to build up and have sufficient material to seal.
On my mini tubbed Dakota I recently did the intake manifold plenum plate re seal. While the keg was removed I set my Offenhauser dual quad on the 5.2 as well as a Weiand Tunnel Ram. The 273/318 Offy probably will work great with OEM Magnum heads. The Magnum heads have smaller intake ports than the LA340/360. The intakes designed for a 273 don't have enough cast in meat to seal appropriately on the LA 340 port.In fact when the Roots Blower manufacturers would convert Offy intakes into LA blower manifolds they first welded up the flanges and partial port to build up and have sufficient material to seal.