This is the R3 in my Challenger R3 48 degree,Siamese bore , 4.125 x 4 stroke 426 babbit 2 inch cam ,TTi headers ,Victor heads ,Super EFI intake ,Compstar rods ,Molnar crank ,smith bros pushrods ,Diamond 11:1 pistons ,port injection XFI Sportsman,Hughes Rockers ,Crane Ultra pro solid roller...