I've checked around and can't find information specifically on the VSS. I'm going to install a 95 - 4.3 in my 77 crusier, all stock except for the 4.3. This may have been asked many times before but do I need to purchase a new VSS? I'm assuming the engine already has a VSS from factor but not sure. The engine came from a buggy and is basically a stand alone unit. It came with everything except the power steering pump. The computer and wiring harness were sent off before I bought it and had everything not useful removed. All I have to do is plug it up add the O2 sensor to the new exhaust and it should be fairly close to ready. I have alot of experience with carbed engines but not completely up to snuff on the fule injected engines. If this has been beat to death I applogise but can't find info on it other that people saying it is needed.