HELP? Hi! Just got some more pics of truck pieces: it comes with 2 engines one of which has a tranny hooked up to it. Looks like there is also a front and rear end. On the engine that is currently hooked up to the tranny is the following casting #: 28GM 3970010 (this is stamped just ahead of where the tranny hooks up to the engine block). Any idea what V8 this is? I cannot see any engine casting #'s on the other engine....sorry.