If the center exhaust port has a divider, they are 340/360 manifolds, if no divider they are 318 manifolds scope
The 273 and 318 ports are smaller a slightly different port shape also scope

Last edited by Cab_Burge; 06/11/22 07:59 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)