yes the 273 manifolds will bolt right up...i have a64 valiant with 318 mag and use them...have 21/4 duals with cherry bomb..steel pack.. loud but sounds good..you can use your 6 cly radiator..i did with air con..no over heat..stock 318 mag.. efi....also you will need a center link from v8 a body... centerlink has a drop in it to clear oil pan
