Quote Originally Posted by SgtMarshal View Post
it's hardly 500 dollars. cheapest aluminium block LS engine I've seen is 1500, while the 5.3 is 500 dollars. I'm not saying take the LS1 out to swap a 5.3 in, but that is what I would do if the need came up.
Unless you already have an ls to swap stuff over, plan on spending well over 500 to make that 5.3 usable. Easily $300 or more for an ls intake with rails, throttlebody, etc. Then however much to get f body accessories and an oil pan. It adds up.