A V8 will just mess with the Blazers dynamics, weight being the biggest thing i'm worried about. Haven't looked at weight differences myself but at this point with whats a V8 replacement, we either have to stick with the V6 or go get a Tahoe. Always wanted a Tahoe RST but its nearly $20k moreI think $50k is a fair starting price, but I wonder if there are better engines to choose from. As mentioned fitting a V8 in this engine bay could be an impossible task. GM might be better off going with the 3.6l twin turbo V6 from Cadillac.