Is the 4.0 GT2 based engine rule the seize for GT2 of just the max that can be brought over to LMP2? I didn't see anything so far about the GT2 rules for 2011 and beyond. And would GM be allowed to run a 4.5L if it was downsized from a 5L+ Vette street engine or would that end up being classified as a race engine and then be limited to 4.0? Think it would also end any Vette engine in an LMP1, something about a 3.4L engine just doesn't sound like an workable size for the name. Maybe a GM make but a Vette?
