I've received a number of parts for my 5.0 install but have yet to get the FelPro gasket set. I don't know what main seal (or even how many types there are) will be included. But I do know that for an engine that's been sitting for a while it would probably be wise to install a new one while the engine is out. Assuming that the kit has a two-piece seal should I just pull the rear main and try to twist it in? What are your experiences?