as nkbrisson said, any big block motor should drop right in or maybe need minor squeezing to fit. I say should as I am not as familiar with the warhead.....I have even heard about people using starter boxes on them so I wont try and geuss too much.



as to the STS engines, from my experience with a couple D28s and seeing a d21m equipped buggy.....they are wonderful. Take your time with breaking in and listen to setup advice from guys like supertib (has a wealth of STS info) and you will have a great time. You will need to figure out which of the shims and plugs to use with your fuel...then you will be set. The SH lineup is a good bang for buck too, but since this thread is just about what engines will fit I will not go any further